翻译和例句：
1The. headmaster. ……
floating (漂浮) in water. The air sacs (囊) in their throats can fill with up to 50 liters of air. They help...) in water. The air sacs (囊) in their throats can fill with up to 50 liters of air. They help walruses ……
, believe.They may have had balloon-like airsacs(囊) in their bodies, which helped them float. But once ……
-pound (4.5kg) flour sacs (囊) as babies. We tossed a coin (掷硬币) to decide the gender (性别) of our kids ……
做动词，表示“把某物收入袋(囊)中”。PresentUS President Barack Obama received a gift from NBA superstar Kobe Bryant ……
.Bag 原意是“包，袋”，此处做动词，表示“把某物收入袋(囊)中”。 ……
it’s like being a parent. The 10-pound (4.5kg) flour sacs (囊) were used as babies. We tossed (掷) a coin ……
(囊) from rhino-like (类犀牛的) animals to light up their way as light bulbs.The real attraction... mouth is touched, lifting them into the air. Plus, they use sacs (囊) from rhino-like (类犀牛的) animals ……
). They store the nectar in a honeysac(囊) inside their bodies. They bring it back to thehive(蜂箱) and pass ……
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