slot cross-section

例句：

1. 1. The machine has a slot for the screwdriver.
   这台机器有一个螺丝刀的插槽。
2. 2. The car has a slot for the spare tire.
   汽车有一个备用轮胎的插槽。
3. 3. The door has a slot for the key.
   门有一个钥匙槽。