Oso
abbr. 轨道太阳观测台（Orbital Solar Observatory）
🗣️ 情景例句
We are customers of the bank.
我们是贵行的顾客。
Is there any earlier one?
还有更早一点的吗？
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。