以in结尾的单词及中文
terrain n. 地势，地形；
train n.火车；
vain a.徒劳的；自负的；
wain n. 运货马车,北斗七星；
win vi.获胜 vt.赢得；
stein n. 啤酒壶；
rosin n. 松香,树脂
The enemy would always have the advantage of familiarity with the rugged terrain.
敌人会一直在对崎岖地形的熟悉上占有优势。
He knows the terrain of this locality like the back of his hand.
他对这一带的地形了如指掌。
Somewhere a train whistled.
某个地方响起了火车的鸣笛声。
The train was losing speed.
火车当时正在减速。