It means learning to enter and exit in response to predefined signals rather on a whim.

We should not engage in risky procedures on a whim.

我们不该随随便便冒险开始这个流程.

On a whim, I put the map upside down.

我突发奇想, 把地图倒过来.

Think about how much money you spend buying things on a whim.

好好想一下,你因为心血来潮花了多少钱买东西.

She bought it on a whim.

她一时心血来潮买了它.

You cannot call the emergency number on a whim.

急救电话是不能随意拨打的.

Under the new rules, credit-card companies can't jack up interest rates on a whim.

在新法案规定下, 信用卡公司不能凭着心血来潮随意提高贷款利率.

Along with a fellow Parkinson's sufferer, Temple decided, on a whim, to form a choir.

而后, 谭普一时兴起, 决定与同为帕金森氏症的病友组成合唱团.

Regulations are changed on a whim, resulting in aberrant results that distort long-established competitive values.

规则可以因为一时的兴致而改变, 造成的异常结果扭曲了确立已久的竞争价值观.

As president, he can dissolve parliament on a whim.

作为总统, 他可以随意解散议会.

He picked people on a whim, without rhyme or reason.

他选人时总是随心所欲，毫无根据。

The meeting was postponed on account of the chairman's illness.

由于主持人生病,会议延期了.

I don't want to upset her on account of the milk.

我不想让她不高兴,要不,会影响奶水的.

The flight was postponed on account of bad weather.

因为天气恶劣,飞行延期了.

We're late on account of the bad traffic.

我们迟到是因为交通拥挤.

On account of his extravagance he was plunged into heavy debt.

由于挥霍浪费,他负债累累.

A newly-married couple, he thought, on account of their walking so close together.

看俩人走路时挨得这么近，他觉得他们是新婚夫妇。

The old worker retired on account of age.

老工人因年老而退休.

Original mail returned on account of incorrect address.

地址不符,原件退回.

Bill cannot come to the meeting on account of illness.

比尔因病不能到会.

Bombers were put on alert during the crisis.

危机时刻,轰炸机处于警戒状态.