Photocatalyzer
光催化剂
🗣️ 情景例句
Let's congratulate ourselves that this transaction has been made.
让我们祝贺这次交易圆满成功。
He has never been out of China, so he is very excited about liveing abroad.
他以前从未出过国，因此对出国很兴奋。
Excuse me. Where's North Street Hospital, please?
请问，北街医院在哪儿？