Nytron
碳氢化合物, 硫酸钠清洁剂
🗣️ 情景例句
and make sure that it is in good condition
确定它状 良好
I ought to stay at home.
我应该留在家中。
We have learnt to expect that trains will be punctual.
我们已经习惯于相信火车总是准点的。