Pneumatic transmission
[化] 气送; 气力输送
🧩 词语组成解析
🗣️ 情景例句
You've been very thoughtful.
你一直都很周到。
When does it arrive?
什么时候到那儿？
A burst of activity associated with the laying of submarine cables soon confirmed the Challenger's observation that many parts of the ocean were two to three miles deep,
海洋中很多地方可深达两三英里，