Unneeded indexes impair the performance of insert/ update/ delete actions, and consume storage and transaction log space.

Too many files are open-please close all unneeded files.

打开文件太多-请关闭全部不需的文件。

Healthy nonessential workers were told to go home.

医疗辅助人员们被告知回家。

Light creates the nonessential pain and the economic loss for the basic unit patient;

轻者给基层患者造成不必要的痛苦和经济损失；

Residents are urged to carefully plan their trips for the New Year and Spring Festival holidays, reduce unnecessary travel, and avoid nonessential outbound travel as well as travel to medium － or high-risk areas in the country.

减少不必要出行提醒广大游客，元旦、春节期间合理安排行程，减少不必要出行，非必要不安排出境旅游，不要前往国内中高风险地区旅游。

Designed for taking over Beijing's functions nonessential to its role as the national capital, the city proper will be a new home for Beijing's colleges, research institutes, hospitals, business headquarters, and financial and public institutions.

未来，起步区将是北京疏解出的高校、科研院所、医疗机构、企业总部、金融机构、事业单位等的集中承载区。

And how was the anonymous letter written?

那封匿名信的笔迹是怎么样的?

He was greatly disturbed by the anonymous letter.

匿名信令他极度不安.

Have you heard about Monsieur Poirot '; s anonymous letter?

“你听说 波洛 收到匿名信了 吗 ?”.

Don't bother yourself with these anonymous letters.

接到匿名信是一件令人不快的事.

There days after Rastus'disappearance, Mrs. Ramsay received an anonymous letter.

在拉斯图失踪的三天后, 拉姆齐女士收到了一封匿名信.

Were those nasty anonymous letters on his mind?

那些卑鄙的匿名信是否依然使他耿耿于怀?

We received an anonymous letter.

我们收到一封匿名信.

The one about the anonymous letter. "

就是那封讲起匿名信的信. ”

The author of the book shall be nameless.

该书的作者是匿名的.

The police swooped on the murderer in his hiding place.

警察出其不意地出现在杀人犯的藏匿处抓住了他.

The police are following a murderer who's in hiding.

警察正在追赶藏匿起来的杀人犯.

Death second self that seals up all in rest.

上帝之死的影子漫漫将一切祈望藏匿并安息远去.

The ventilation system of any building is the perfect hiding place.

任何一所建筑的排风口都是完美的藏匿处.

The burglars stayed at the hotel the night before the break-in.

行窃者在行动前的那一晚就藏匿在水门饭店里.

Police sealed the area off where the murderer was known to be hiding.

警察把凶手藏匿的地区封锁了.