Some doctors advise setting aside a certain hour each day for worry.
一些医生建议每天抽出一定时间思忧。
On a certain day at a certain hour, we will pull in the station.
在某一天的某一时刻，我们将会抵达进站！
On a certain day at a certain hour, we will pull into the station.
某一天在某一个小时，我们将撤出进入车站。
On a certain day at a certain hour, we will pull into the station.
在某一天的某一时刻。我们将会抵达进站！
He would probably return, by a certain hour, in the afternoon of the morrow.
他可能要在第二天下午的某个时刻回来。
One thing, however, is certain: you should schedule a minimum of one hour of study for each classroom hour.
但有一件事是确定的：每一课时应安排至少一小时学习时间。
One thing, however, is certain: you should plan at least one four of study to each classroom hour.
不过，有一点是肯定的：你应该为每课时至少在课下计划学习一小时。
At present, 15 Chinese cities allow a 72-hour visa-free entry for nationals of certain countries.
目前，中国15座城市允许对某些国家的公民实行72小时免签证入境。
On the hour every hour he ACTS in a certain way.
每隔一小时一小时，他的行为在一定的方式。
But the table must be decorated and a certain form observed at the dinner hour;
但是，必须装饰餐桌，进餐时必须讲究一定的规矩，否则，马虎的习惯就会突如表现出来。
On the hour every hour he ACTS in a certain way.
在每小时一班，整他的行为以一定的方式。
One thing, however, is certain: you should plan at least one hour of study for each classroom hour.
不管怎样，有一件事情是确定的：你应该为每节课安排至少一个小时的学习时间。
One thing, however, is certain: you should plan at least one hour of study for each classroom hour.
不管怎样，有一件事情是确定的：你应该为每节课安排至少一个小时的学习时间。
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