Many accidents happen due to human error.

许多事故是由于人为错误引起的。

Accidents happen when you least expect them.

意外总是在你最意想不到的时候发生。

We feel safe because accidents happen with infrequency.

由于事故很少发生，我们感到很安全。

B That’s when accidents happen.

B 事故就发生在这个时候。

Most of us, though, grudgingly accept that accidents happen.

不过，我们大多数人咬牙接受事故可能发生。

Results Food-poisoning accidents happen more frequently in the third quarter.

结果食物中毒事故第三季度高发。

It is true that most accidents happen on takeoff and landing.

有个事实是大部分的飞行事故都发生在飞机起飞和降落的时候。

Results Food - poisoning accidents happen more frequently in the third quarter.

结果食物中毒事故第三季度高发.

Several Sticking accidents happen in the course of drilling horizontal wells in Tahe Oilfield.

塔河油田水平井钻井过程中,曾多次发生卡钻事故.

Several Sticking accidents happen in the course of drilling horizontal wells in Tahe Oilfield .

塔河油田水平井钻井过程中，曾多次发生卡钻事故。