Dihalomethylenation
二卤亚甲基化作用
🗣️ 情景例句
How are you?
你好吗？
It's two blocks straight ahead.
笔直向前走2街区。
The first question to answer is whether a planet can actually support life.
第一个需要解答的问题是一颗行星是否有能够维持生命的条件。