The extra players, or substitutes, wait until they are called.额外的运动员或是预备去替换的人没被召唤时在里面等着.Basically cleared off the newest antijamming ultra - high frequency communications system, ARC - 187 substitutes is considered obsol...
Industry has been working at developing harmless substitutes for these gases.该行业一直在努力开发一些可以替代这些气体的无害物质。The extra players, or substitutes, wait until they are called.额外的运动员或是预备去替换的人没被召唤时在里面等着.He substitutes as our teacher...