train on的用法和样例：
例句
- They ranged their guns on the enemy blockhouse.
他们把大炮瞄准敌人的碉堡。 - Cupid draws his arrow on both footman and pharaoh.
爱神丘比特的箭已瞄准了沐浴在爱河中的人们。 - She trained her camera on the caged panda.
她把照相机对准笼子里的熊猫。 - The cannon is zeroed in on a certain target.
大炮对准一个确定的目标。
词汇搭配
- get on the gravy train 干不费劲的差事...
