必需

To do that, a substantial surge is needed.

要实现这一目标，大规模的增兵是必需的。

That's why you need a survival kit containing reliable emergency supplies that will be ready for use during a time of emergency when stores will be closed, electricity will be out, buildings will be unsafe to occupy, and roads will be unavailable.

这就是为什么你需要准备一个包含紧急必需工具的紧急生存工具箱，当发生紧急情况时，商店会关门，电会被掐掉，建筑物里不再安全，公路也无法利用时你会用到它。

Water is one of the materials required to sustain life .

水是维持生命所必需的物质之一。

Process water technology is an important part and necessary technology sustentation in pharmaceutical industry. It must reach the quality target of pharmacopoeia, like other materials in the drug producing.

工艺用水技术是制药工业的重要组成及必需的技术支撑，必须同药品生产的其它原辅材料一样，达到药典规定的质量指标。

We would be in sweat pants at nine in the morning, sword fighting with bamboo swords, and then recording it, and then watching it back, and seeing what we did wrong and how awkward we looked.

我们必需在早上9点时穿上宽松裤，用竹剑打斗，把它拍下来后再播放观看，看看那里做错了以及那里看起来笨拙不灵活。

In order to make data synchronization efficient, some method of change tracking is required.

为了使数据同步有效，某种修改跟踪的方法是必需的。

Since it is an inverse problem, numerical techniques, such as discretization of the integral into a system of linear equations, are necessary.

由于这是一个反问题，一些数字技术比如将积分离散化为一个线性方程组是必需的。

To undertake a systematic random sampling, one needs to know the total number of households, the average number of children under 5 years of age in a household, and the total population.

要进行一次系统随机抽样，必需知道该人群中的家庭总数，每户家庭5岁以下儿童的平均数，以及总人口。

At the same time it is necessary to entertain taintless thoughts and love in your heart , while holding a pencil, paper prepared.

同时去接受纯洁清白的思维和在你心里的爱是必需的，同时拿着一支笔，准备好纸。

There are times when to take a chance is necessary and called for.

在有些情况下，冒险是必要的也是必需的。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。