A method for effective and economical operation of water treatment system

But in recent year, along with the continuous deepening of petroleum enterprise reformation, the benefit is thought much of by oil field. And also the economical of acidification and fracturing attract more attention.

但近年来，随着石油企业改革的不断深入，油田开发企业更加重视经济效益，因此对酸化、压裂措施的经济性也越来越关注。

This instrument is compact in construction, convenient to use, easy to disassemble and install, economical of energy, lower cost and good result of braking.

本装置具有结构紧凑，拆装使用方便、节约能源、成本低、制动效果好等优点。

The proposed method does not involve power interruption and is economical of transformation time and expenses.

应用该方法不需要停电施工，改造时间短，改造费用低。

Before eating breakfast, I read the newspaper.

吃早餐前我看报纸。

Before eating and after using the toilet

餐前便后

Eating rice dumplings is best not to cold, heat thoroughly before eating.

粽子最好不要凉着吃，吃前要彻底加热。

How long should I wait before eating solids?

我要等多久才能吃固体食物？

Maintain good personal hygiene, wash hands properly before eating and food handling.

维持好个人的卫生保健，吃食物之前要洗干净或做好适当的处理。

Plus people often boil the clay before eating.

再加上有食土癖的人通常会把泥土煮熟再食用。

You can order some drink before eating.

用餐前你可以点些饮料。

Always wash fruit and vegetables well before eating.

在吃之前洗好水果和蔬菜。

You shall wash your hand before eating, to guard against disease

你饭前应洗手，以防生病预防狂犬病注射证明书

How long do we have to wait before eating?

我们要等多久才能吃啊？

She made her children wash their hands before eating.

她要她的孩子们在吃东西前洗手。

Increasing numbers of Americans are leaving home in the morning and waiting until they reach their destination before eating breakfast at their office desk — a trend recently dubbed, "desk-breakfast" or "deskfast."

越来越多的美国人现在都选择早晨到办公室以后在自己办公桌边享用早餐，这种趋势叫做deskfast（桌边早餐）。

Wash the fruit thoroughly before eating.

把水果彻底洗干净后再吃。

So, the model can be applied to the study of summer rain in Eastern China.

因此，该模式可以应用于中国东部夏季降水的模拟研究。

Study of approaches and seismic monitoring water drive front in oilfields of eastern China

我国东部油区水驱前沿地震监测和方法研究

Perspective of the Vegetation Zonation of Forest Region in Eastern China

中国东部森林植被带划分之我见

The gravity structure of rift-valley basin in eastern China

中国东部裂谷型盆地的重力构造