Plumbane
烃基铅
🗣️ 情景例句
Seeing as you are all so tired, we'll finish this lesson next time.
考虑到现在你们都很累了，这课我们下次接着讲吧。
I will go to the beach.
我将去海边。
Sometimes ago, the United States Navy, for instance,
例如，美国海军前些时候