put a coin in the 整句是这样的:when you park at a meter,you must put a coin in the slot.如果能翻译全句就更好了．

put a coin in the 整句是这样的:when you park at a meter,you must put a coin in the slot.如果能翻译全句就更好了．
put a coin in the
整句是这样的:when you park at a meter,you must put a coin in the slot.如果能翻译全句就更好了．

put a coin in the 整句是这样的:when you park at a meter,you must put a coin in the slot.如果能翻译全句就更好了．
当你把车停在停车计费器旁边的时候,你必须在计费器的凹槽里投币

当你把车停在咪表区时，你必须（向槽中）投币。
parking meter 汽车停放收费器

比如你自己举例，停车计费时，投币。
还比如：乘公车时，投币，都可以用。
还有储蓄罐的口也是slot,所以想像一下
理解slot后，就容易多了。
祝顺！

put a coin in the slot 把硬币放进投币口里
整句是： 当你把车停放在汽车停放计时器时，就必须把硬币放进投币口里。