🗣️ 情景例句
And, Carl, you join in at any time.
还有Carl， 你随时都可以加入。
In the United States ,there are many factories for making cloth.
在美国，有许多造布的工厂 。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。