Lethen.遗忘河；忘却；遗忘letv.让；允许；(用于祈使句表建议、请求、命令)让；假设；出租n.出租；阻碍；(网球等)触网重发Let us ignore these irrelevancies咱们不必管这些不相干的事.Let mom give you taletelling?左伴随同态Let's smoke out the mosquitoes.左乘原则Let's go through the exercises.左鞭毛孔板Let's not quibble over pennies.左壁肯特(氏)束Let's get together again sometime被遗弃、没有人烟或者空无一物。Let's have you counter-offer.左房平均压Let's clean the desks together.左侧式转辙机Let's cement the parts together.左后下Let's talk about delivery dates.左心室压； 左心室压力