Propenyl
丙烯基
🗣️ 情景例句
She's coming over this morning to help me with my math.
她今天早晨要过来帮我补习数学。
If I had known that, I could have helped you.
假如我早知道，我就能帮你了。
For one thing they keep the water clean.
一来，水下植物可以保持水的清洁。