The pain racked him.痛苦折磨着他.The country is now racked by three violent separatist movements.这个国家目前正被3场激烈的分离主义运动所困扰。He racked no rents to maintain the expenses of his establishment.他不向租户索取过高的租金来维持公司的开支。A toothache racked m...
The trap is commonly used for floats, thermal power, free - float, double - metal - style , pulse, and so on - bell - shaped float.常用的疏水阀有浮桶式 、 热动力式 、 自由浮球 式 、 双金属片式、脉冲式 、 钟形浮子式等....