The three main expeditions were plowing through seas infested with U - boats.三个主要远征部队驶经充满潜艇的海岸.It's all to no purpose; I tell you that you are plowing the sand.这是徒劳无益的; 告诉你,你在枉费心机.When plowing, I plowed deeply ; whe...
Gastric juice contains hydrochloric acid to provide an acidic solution for pepsin.胃液内含有盐酸给胃蛋白酶提供酸溶液.Gold can't be dissolved in hydrochloric acid.黄金不会溶解于盐酸之中.This mixture is then mixed with dilute hydrochloric acid.氰...