Phostonic acid
[化] 烷基亚膦酸
🧩 词语组成解析
🗣️ 情景例句
Thanks a lot.
多谢。
What's goes on here?
什么事？
for it is then almost ready to undertake heavy work and can begin to earn its keep straight away.
这个年龄的象差不多已能干重活，可以很快挣回饲养它的开支。