6乘以2等于12。
Most bats navigate by echolocation.
大多数蝙蝠通过回声定位飞行。
Wind is a current of air caused by a vacuum caused by hot air rising.
风是由热空气上升产生真空而引起的空气流动。
Fortunately, volunteers are not motivated by self-interest, but by altruism.
幸运的是，志愿者们不是被自身利益而是被利他主义推动。
They are staffed by volunteers.
他们的员工都是志愿者。
She was ambushed by reporters.
记者突然一拥而上采访她。
我们只是互通电邮。
She had overshot by 20 metres.
她超过了20米。
I wouldn't go there by choice.
让我选择，我不会去那里。
The house is backed by fields.
房子的后面是田野。
A convoy of trucks rattled by.
卡车队隆隆驶过。
凯紧紧抓住他的手腕。
利润突降50%以上。
我们借着星光走回家。
He was attacked by wild animals.
他被野兽袭击了。
他差点丧了命。
Dena was enchanted by the house.
蒂纳被这幢房子给迷住了.
Farm workers milked cows by hand.
农场工人们手工给奶牛挤奶。
Output should triple by next year.
到明年产量应增至三倍。
他们在烛光下进餐。
这事星期五之前做不了。
我们将车停放在路旁。
He was esteemed by his neighbours.
他备受邻居尊重。
They've increased the price by 50%.
他们已经把价格提高了50%。
He was floored by the announcement.
他被这个通告震惊得不知所措。
She seemed unperturbed by the news.
她听到这消息似乎并不惊慌。
The President's motorcade glided by.
总统的车队一溜烟开了过去。
She appeared unworried by criticism.
她看上去并不在乎挨批评。
Pedestrian accidents are down by 5%.
行人受伤事故下降了5%。
Insulin is secreted by the pancreas.
胰岛素是胰腺分泌的。
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