每三天我去那里一次。
You can water the flowers every three days.
你可以每三天给花浇一次水。
Each pine log must be replaced every three days.
每根松木支架都必须每三天更换一次。
There's a film every three days.
每三天有一部电影。
He comes to see us every three days.
他每隔三天来看我们一次。
We have history class every three days.
每 隔三天我们上一节历史课。
He comes here every three days (every third day).
他每三天来这儿一次。
He comes here every three days (every third day).
他每三天来这儿一次。
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