The fluorine mixed gas prepared by this device, which may prolong the working hours of excimer-laser 2 to 3 times and prolong the average useful time of lens of laser 3 to 5 times.

按规程应用该装置配制的含氟混合气，可以使准分子激光器的有效工作时间延长2 ~ 3倍，激光器中镜面的使用寿命平均延长3 ~ 5倍。

youdao

To prolong doubt was to prolong hope.

延长疑虑就是延长希望。

youdao

The statement said the reclusive militant leader will never agree to talks that prolong the presence of foreign troops in Afghanistan.

VOA: standard.2009.11.27

But efforts by governments to extend and prolong unemployment benefits, and to offer more job counseling and training have not kept up with the rising numbers of jobless.

VOA: standard.2009.09.16

"Waiting does not prolong a favorable outcome.

VOA: standard.2009.10.01

When used in conjunction with chemotherapy, it can prolong the life of patients with breast cancer.

FORBES: FDA Should Not Rescind Avastin's Breast Cancer Approval

The accession soon afterwards of the first north African country, Morocco, helped to prolong Europe's boom.

ECONOMIST: Is the best yet to come?

All it does is prolong the pain, or kick the can down the road.

FORBES: Why Everybody Should Pray The Foreclosure Bans End