Amberplex
离子交换膜
🗣️ 情景例句
I suppose I could call him.
我想我可以打电话给他。
He is supposed to be there on time.
按理说他应该准时到那儿。
New jobs are needed because a number of people are out of work.
因为许多人没有工作，所以需要为他们提供就业机会。