Celanese
n. 一种人造丝
🗣️ 情景例句
You go first.
你先来。
He has pamphlet.
他有一本小册子。
for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。