Based the camera system model, the calibration method oft he whole system is precisely deduced.

For loan oft loses both itself and friend.

因后者常致财友均失.

This type of accident happens only too often.

这类事故太多了。

Early American weathervanes were most often cut from flat wooden boards...

美国早期的风向标大多截自平直的木板。

I see her quite often.

我常常见到她。

It's often difficult to translate poetry.

诗歌往往很难翻译。

How often do you brush your teeth?...

你多久刷一次牙？

I've often wondered what happened to him.

我时常纳闷他出了什么事。

They often spent Christmas at Prescott Hill...

他们经常在普雷斯科特山过圣诞节。

How often do you go to the theatre?

你多长时间看一次戏？

We should meet for lunch more often.

我们应该更常一点相聚在一起吃午饭。

Although sometimes I feel like bothering, as often as not I don't...

虽然我有时会觉得这是在找麻烦，但是通常并不会这样。

All too often the animals die through neglect.

动物因缺乏照料而死亡的事司空见惯。

I don't know how often I heard the same awful jokes...

这种千篇一律的烂笑话我不知道听过多少回了。

She's going to come back every so often...

她会偶尔回来的。

We often go there.

我们常去那里。

She often works at the weekend.

她周末经常要上班。

People are often afraid of things they don't understand.

人往往对自己不懂的东西感到恐惧。

It is not often that you get such an opportunity.

你得到这样的机会，可不是常有的事。

An inspector comes round every so often to check the safety equipment.

偶尔有检查员来检查安全设备。

Try to exercise as often as possible.

尽可能经常锻炼。