External calibration is key method used for spaceborne SAR antenna onboard measurement.

Receive fax-in and sort by dept. Distribute fax once a day.

收传真并分类, 每天一次按部门分发传真.

And close your eyes. And smile least once a day!

还有闭上你的双眼. 每天至少一次微笑!

Watered once a day, the flower will grow very well.

如果每天浇一次水, 这花会长得很好.

Take curative baths once a day, and drink some mineral water.

每日洗一次医疗澡, 并且喝些矿泉水.

Put a plaster on the sore once a day.

把这药膏每日一次敷贴患处.

The earth turns on its axis once a day.

地球在它的轴上每天转动一次.

You should brush your teeth at least once a day.

你每天至少要刷一次牙.

She has to mop the kitchen floor at least once a day.

她至少每天擦一次厨房的地板.

And they are only given food once a day.

而且它们一天只吃一次东西.

At least 60% of us now bathe or shower once a day.

现在我们当中至少60%的人每天淋浴或洗澡一次。

And close your eyes, And smile at least once a day!

然后闭上你的双眼, 记住每天至少微笑一次!

Walking at least once a day, each about half an hour.

每天至少散步一次, 每次大约半个小时.

It'should be done at least once a day, before brushing.

每天至少使用一次, 在刷牙之前.

Each student has to hand in a composition once a week.

每个学生每周必须交一篇作文.

In the ordinary course of events, I visit her once a week.

在一般情况下, 我每周去看她一次.

Slough off dry skin once a week.

每周除一次干皮.

Of course, I'll visit at least once a year, maybe more.

当然, 我最少每年会来拜访一次, 也许更多次.

Once a year a race is held for old cars.

每年举行一次旧汽车比赛.

Serpents cast their skin once a year.

蛇每年蜕一次皮.

The Moon reaches its absolute perigee once a year.

月球每年有一次达到它的绝对近地点.