Raney's catalyst
[医] 兰尼氏催化剂, 海绵状镍催化剂
🧩 词语组成解析
🗣️ 情景例句
I need to confirm my reservation.
我要确认我的预定。
Who is a social worker for the City of Los Angeles.
她是洛杉矶市政府的社会工作者。
I joined in the march and we were marching peacefully along and then the police came up.
我参加了游行，我们以和平的方式往前行进，这时警察突然来了。