1.sibling n. 兄弟姐妹
I have two brothers and a sister: three siblings in all.
我有两个哥哥和一个妹妹: 共有三个兄妹.
2.sawmill n. 锯机, 锯木厂
There are many sawyers in that sawmill.
那家锯木厂有很多锯木工。
3.trooper n. 骑兵, 伞兵, 运兵船
He became a trooper in the Royal Tank Regiment.
他当上了皇家坦克团的装甲兵。