Pentafluorinated
五氟化的
??? 情景例句
When do you need the volunteers,
你們什么時候需要義工
The restaurant has built up a fine reputation for a good food.
那家飯館因飯菜美味可口而建立了良好的聲譽。
But real tramps are not beggars.
但真正的流浪并不是乞丐。