Hexylene
己烯
🗣️ 情景例句
Do you have any plans after class today?
今天下课后你有什么安排吗？
A man may love his house well without riding on the ridge.
有宝何必人前夸。
below 20 per cent, its bactericidal action is negligible.
浓度低于20％时，杀菌能力基本上就不存在了。