歡迎閱讀《週日科學版》！在暑假期間，我們每週日都要為你介紹可以在家中進行的有趣科學實驗。你可以在《科學日誌》中記錄自己做了哪些活動，這樣就可以將所學的紀錄下來，比較這些結果，也許還可以利用它們來設計新的實驗！先看一下《科學日誌》的點子再開始吧。展開實驗之前，記得要獲得大人許可喔！
Everyone knows that bubbles are great fun. But have you ever seen an anti-bubble? This week we're going to show how to create anti-bubbles. This experiment is best done by a well-lit sink. It will be best if you read "What's the Science" before you try the experiment.
What you will need:
A large jar
A bowl
Water
Dish detergent
A chopstick (for stirring)
A pippette (bigger is better), or the pump/chamber from a syringe (get the chemist to remove and dispose of the needle for you). An empty, clean squeezy plastic bottle would work too.
Food coloring (optional)
▲ Fill the jar with cold tap water.
▲ Add several squirts of dish detergent.
▲ Stir the solution gently.
▲ Put some warm water in a bowl and add a couple of squirts of dish detergent. If you are going to use food coloring add a drop now. Stir gently.
▲ Take the pippette and squeeze out as much air as you can.
▲ Place the end of the pippette in the water in the bowl, release your grip and let it fill with water. Put the pippette aside.
▲ Very gently pour a little extra water into the jar. You don't want to make any soap bubbles! The jar should overflow.
▲ Take the pippette and hold it just above the surface of the water in the jar. Gently squeeze the pippette. Keep practicing until you are making little drops of water that skate across the surface.
▲ When you have got the knack of making the skating drops, try following the gentle squeeze which makes a skating drop with a slightly stronger squeeze. This should make the drop go under the surface to make an antibubble. Be patient, making antibubbles takes practice! (catherine Thomas, staff writer)
大家都知道泡泡很好玩，但是你曾看過「反泡泡」嗎？本週我們要教你如何製造「反泡泡」，這個實驗需要一個光線足夠的水槽，而且你最好先看過今天的「科學原理」再開始實驗唷。
所需材料︰
一個大寬口瓶
一個碗
水
洗碗精
一枝筷子（攪拌用）
一支滴管（越大越好）或注射針筒的壓頭和筒身部分（請藥劑師幫你拿掉針頭並加以丟棄）。也可用一個可以擠壓的塑膠空瓶代替。
食用色素（可有可無）
▲ 在瓶中裝滿自來水。
▲ 加入數滴洗碗精。
▲ 輕輕攪拌溶液。
▲ 在碗中裝入一些溫水，加入幾滴洗碗精。若你準備了食用色素，現在可以加入一滴，然後輕輕攪拌。
▲ 拿起滴管，盡可能將滴管中的空氣擠出。
▲ 將滴管尾端放到裝溫水的碗中，將緊握的手鬆開一點，讓滴管吸滿水後，置於一旁備用。
▲ 非常輕柔地再加一些水到瓶中，注意不要讓瓶中產生肥皂泡！讓瓶子的水滿到溢出來。
▲ 拿起滴管，將其尾端置於瓶口的水面上方。輕輕地擠壓空氣頭，多做練習，直到你擠出的小水滴能夠滑過水面。
▲ 當你抓到如何做出滑行水滴的訣竅後，試著稍微用力一點點擠壓滴管，擠出來的水滴應該會沉到水面下，如此就成功做出「反泡泡」囉！要有耐心、多練習才能製作出「反泡泡」！（翻譯：袁星塵）
Photographer Franziska Stuenkel likes to take spontaneous urban shots, so she needs a nimble camera that is ready to go when inspiration strikes: her German-made Leica M11. “I have to be very quick and discreet,” said the Berlin-based artist who captures reflections of people walking past windows, their contours merging with the shapes behind the glass. Stuenkel’s compact Leica is the perfect camera for the job, the 51-year-old told AFP. Famous for its pocket-sized and retro-style devices, the Leica brand is celebrating a milestone as it marks 100 years since its first commercial camera was presented to the public. The
Picture a 45-foot-long animal with a 5-foot-long skull and 3-foot-long arms. It may not seem strange until you realize that a human with those proportions would be 6 feet tall with 5-inch arms. Although the Tyrannosaurus rex went extinct 65 million years ago, the mystery of its unusual body __1__ has fascinated scientists for over a century. Barnum Brown, the paleontologist who first discovered T. rex fossils, initially found it hard to believe that the tiny arms belonged to such a __2__ creature. One of his colleagues speculated that the short forelimbs might have been used to hold the
Dogs’ noses are incredibly keen. They can even detect changes in cortisol levels in human sweat and breath. Known as the “stress hormone,” cortisol increases when humans are under pressure. Recent research indicates that the smell of human stress can influence a dog’s behavior and emotions. In the study, human volunteers were exposed to the stressful tasks of preparing and delivering a speech on the spot and then solving math problems. __1__ Researchers collected sweat and breath samples from the volunteers on pieces of cloth during both their stressful and restful states. Meanwhile, other researchers worked with 18
1. 錢已經用一半了。 ˇ Half of the money is gone. χ Half of the money are gone. 註：Half of ... 作主詞時，動詞與介詞 of 後面的名詞或代名詞相一致，即名詞或代名詞是單數時，動詞該是單數；若為複數，則動詞也該是複數，例如： Half of the story is interesting. Half of the stories are interesting. Half of it is interesting. Half of them are interesting. 2. 許多人走過這條路。 ˇ Many a man has travelled this road. χ Many a man have travelled this road. 註：many a 意義上雖然作 many 解，但後面應跟單數名詞，動詞也用單數形式。 3. 敵人被迫投降。 ˇ The enemy were forced to surrender. χ The enemy was forced to surrender. 註：enemy 作為總稱，前面須有定冠詞，用作句子主詞時，動詞通常用複數形。類似的情形如 talent： Taiwan is known for its semiconductor technology and is actively working to attract and retain global talent. 4. 他倆誰都不該責怪。 ˇ Neither of them is to blame. χ
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