theiradj.他们的；她们的；它们的Their swords clashed.他们的剑互相撞击； 铿锵有声.Their name is Legion.他们人很多。Their life is a poem.他们的生活是一首诗。Their zeal redoubled.他们的热情更高了。Their request is absurd他们的要求是荒谬的。Their son is a dwarf.他们的儿子是小矮人。Their opinions clash.他们意见冲突Their words don't tally救援机关Their Sound Is Gone Out他们的声音到处传播their lead-off hitter第一击球员

1. A novel grease additive derivative of thiadiazole was synthesized.
   摘要合成了一种新型润滑脂添加剂噻二唑衍生物。
2. The actual compound is considered to be a derivative or the parent compound.
   把实际化合物看作母体化合物的衍生物。