常見例句用作及物動詞 (vt.)It is very important to preplan first aid and treatment for fluorine and hydro-fluoric acid exposures because of their unique properties.因爲(wèi)它們的獨(dú)特性質(zhì)，對氟和氫氟酸暴露的急救和処理預(yù)先計劃是非常重要的。 返回 preplan