Cationite
阳离子交换剂
🗣️ 情景例句
Los Angeles? That's a big decision. Los Angeles
这可是个大决定。
Life without a friend is death without a witness.
在世无朋友，死后无证人。
CUSTOMS OFFICER: Are your friends tourists too?
你们的朋友也是来旅游的吗？