在街上看见有人饿晕是很平常的事。It's commonplace to see people collapsing from hunger in the streets.她昨天一整天都在街上四处奔走，搜集证据。She spent all day yesterday tramping the streets, gathering evidence.小型出租车禁止在街上兜揽生意。Minicabs are not allowed t...
粘结剂对纤维的集束性能是必需的.A binder is necessary for strand integrity.在混凝土中水泥是粘结剂.Cement is the bond in concrete.对所有粘结剂粘结的首先要求,就是必须能浸润基材.The first requirement for any adhesive bond is that the adhesive most wet the substrate....