精选优质文档-倾情为你奉上2018上篇期末考试范围P.23例2This type of spring is extensively used in electrical instruments, and deserves special consideration.这种弹簧广泛应用于电工仪表中，因此值得专门考虑一下。P.24 例3If the reaction took hours, and not seconds, the fuel costs would be prohibitive.如果这一反应要花费数小时，而不是几秒钟，燃料费就太高了。例7Keep the batteries in dry places, and electricity may not be made to leak away.（如果）把蓄电池放在干燥的地方，就不会漏电。这种句式中，祈使句表示条件，and后面的句子表示结果，可译为“如果，就”，或者“就”。P.25例12In other words mineral sub
