Therefore, developing the mechanical seal for variable work conditions is the critical task to improve the life of the mechanical seal.

因此，开发变工况机械密封以适合机械密封在变工况条件下的工作成为解决机械密封寿命的关键。

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The test results show that the predicting fatigue life under variable amplitude loading follow the log normal distribution and agree well with simulation test results.

结果表明，变幅载荷下疲劳寿命的预测结果和模拟结果均服从对数正态分布，且两者符合很好。

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Analyzes the factors influencing the service life, which is variable and complex, and summarizes a series of complete schemes to prolong the service life of e-gun of EBCT.

因为影响EB CT电子枪寿命的因素种类繁多且复杂，我们总结出一系列完整的方案，以延长EBCT电子枪的使用寿命。

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There's something called "variable life," which refers to a life insurance policy where the policyholder can make decisions about the investment of the money in the whole life policy.

有种保单叫做"可变寿险",作为终身寿险的一种,投保人可以自主选择,在终身寿险上进行多少投资

耶鲁公开课 - 金融市场课程节选

Variable life insurance can cut your tax bill, but your financial picture has to be just so.

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There are many variations on the permanent life insurance policy, including whole life, universal life and variable universal life.

FORBES: Estate Tax Insurance

Many view MetLife as primarily a life insurance company selling a variety of products such as variable, universal, whole and term life insurance policies.

FORBES: MetLife Pushes New Products, Adds Life To Shares