I heard the ripple of the stream.我听到了小溪的潺潺声.Delayed flights have a ripple effect. Just one late flight could be carrying passengers for a dozen connecting services.航班晚点会引发连锁反应。仅仅一趟晚点的航班就可能运载着许多需要转机的乘客。There was a ripple ...
His hobnail boots clattered on the stone floor.他那双钉了铁掌的靴子在石地板上嗒嗒响。He dropped the knife and it clattered on the stone floor.他一失手，刀子当啷一声掉到石头地面上。He turned and clattered down the stairs.他转过身，噔噔噔地下了楼梯。His hobnail boots clatte...
它们对被它们催化的反应有很强的专一性.They are highly specific for the reactions that they catalyze.这个脱羧作用是由谷氨酸脱羧酶催化的.This decarboxylation is catalysed by the enzyme glutamic acid decarboxylase.这个复合反应是被邻氨基苯甲酸合成酶催化的.This complex reaction is...