Condoms are an effective method of birth control if used with care.如果使用得当，避孕套是很有效的避孕手段。Although most condoms contain spermicide, there are some manufactured without.虽然多数避孕套含有杀精剂，但也有一些是不含的。Abstain from sex or use condoms....
长途驾驶时，腰部的支撑十分重要。Lumbar support is very important if you're driving a long way.双手置于腰部，吸气。Place your hands on the small of your back and breathe in.他的名牌套装在腰部起了褶皱。His designer suits ruck up round his middle....
轮船进入陌生的港口前要雇用引航员.A steamer takes on a pilot before coming into a strange harbour.这位引航员引导我们通过了危险的暗礁区.The pilot guided us through the dangerous reefs.马克·吐温曾当过密西西比河上的引航员.Mark Twain was once a river pilot on the Mississippi....
他们全都光着脚走过潮湿的沙地来到水边。They all walked barefoot across the damp sand to the water's edge.他们的喧闹声在凝滞而潮湿的空气中显得更吵了。Their noises were magnified in the still, wet air.有潮湿的木料和机油的气味。There was a smell of damp wood and machine oi...
With the X - frames projecting into the boxes, the transverse diaphragms were formed.把这些 X 框架放进这些箱体, 就成了横隔梁.The team tried projecting the maps with two different projectors onto the same screen.这个小组想用两台不同的投影仪把这些地图投射到同一个屏...