(中译英)1919年,中国工人阶级作为独立的政治力量,开始登上历史的舞台。
(英译中)When the reply came a few months later they were enrolled as full members, but Chu Teh's membership was kept a secret from outsiders.
五四运动是一次彻底的不妥协的反帝反封建的革命运动。译文:()was a thoroughgoing and uncompromising revolutionary movement against imperialism and feudalism.
预硫化过程用硫化剂和烃类充填催化剂孔道,因而催化剂无需干燥。