触发器用来产生激励脉冲,供闸流管点火.The trigger is used for generating excitation pulse for the thyratron to ignite.也可以用 可控硅 整流器或者是半导体闸流管.A SCR ( silicon controlled rectifier ) or thyrister can also be substituted for the contactor.然而,半导...
She was only six and still missing her front teeth.她才6岁，门牙还没长出来。One of his front teeth has dropped out.他的一颗门牙掉了.One of his upper front teeth was loose.他的上排门牙有一颗松了劲....
Make sure the draining board, sink and plug hole are regularly disinfected.滴水板、水槽和塞孔一定要定期消毒。Make sure that your meal won't be smothered with white sauce.千万不要把自己的饭菜上都涂满白汁沙司。Make sure you join the queue inside the ban...