必需

"If Mum already get up, finish the following household duties or or before 5:30pm according to the timetable 1. clean up the toilet bath tub, sink, toilet bowl, mirror… ect; 2. kitchen (clean up cupboard, stove, wall, ventilation fan… ect"

"11：00-5：30pm "，"开始做家务：若太太已经起床，然后根据时间表打扫 1 清洁及整理厕所(浴缸、洗面盆、马桶、镜) 2厨房(橱柜、煮食炉、墙、抽油烟机)，这些工作必需於5：30pm前完成。"

Coat hanger s and dress hanger s are necessary to keep clothes neat.

挂上衣和连衣裙的衣架是保持衣服整洁所必需的。

Magnesium is a component of the chlorophyll molecule, photosynthesis and serves as a cofactor in most enzymes.

镁是合成叶绿素和光合作用的必需元素，也是活化多种草坪酶的必要元素。

Potassium ions are required in high concentrations in the cell for efficient protein synthesis, and for glycolysis in which they are an essential cofactor for the enzyme pyruvate kinase.

在细胞中 K+需要维持较高的浓度，以便有效的进行蛋白质合成，另外在糖酵解中 K+也是丙酮酸激酶必需的辅助因子。

In addition, unlike bank loans, collateral is not required.

此外，与银行贷款，抵押并不是必需的。

Position: A "flat" organizational structure does more harm than good in promoting collegiality and cooperation in business.

论点：根据员工的经验和技术能力来划分员工的职称和工资等级是合理的，也是必需的。

The coefficients in trial function can be gained by the point collocation method, then the solution of the boundary value problems is obtained. Non - uniform beams and irregular plates on Winkler foundation and plates on elastic half space foundation can be numerical calculated by the introduced method.

为对土与结构物的相互作用进行研究，在采用适当的土体模型的基础上，必需求解地基与基础的共同作用方程，而该共同作用方程一般是偏微分方程或微分积分方程，除一些简单的模型外，其解析解较难获得，因此只能采用数值方法求其结果，加权残仇法是一种L作鼠少、简便易行的数仇方法{2，但其解的精度'。

Where it is impossible to locate the individual with the required knowledge, they must come up with the information through other means.

在位于有着必需的知识的个体是不可能的地方，他们一定透过其他的方法提出数据。

In 1854 commodore perry concluded his treaty with japan, and quickly it became a must for travelers.

1854年，佩里在结束了同日本的条约，并迅速成为了旅客必需的。

I think I have the competence necessary for a ''.

我想我有当导游所必需的能力。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐