有四种

Nutrient components of sweet potatoes with weed management in organic cultivation was better by intercropped soybean. Crude protein, reducing sugar and starch were better with thrice intertillage. Nutrient components of sweet potatoes with different mulch was better by peanut shell.

不同方式控制杂草对甘薯营养成分之影响试验中，四种不同绿肥间植，以绿肥大豆在各成分中表现较佳；四种耕犁次数控制杂草试验，三次耕犁对粗蛋白、还原醣及淀粉有较佳之表现；四种敷盖物以花生壳对各种成分有较佳之表现。

There are four principal types of limestones.

石灰石有四种主要类型。

There are four different game modes : Pairs , Twins , Quads and Triads .

有四种不同的游戏模式：对，双胞胎

In the second condition, a new sememe is added to the old word while old sememes are reserved.

旧词在什么条件下会获得新义位，通过分析大致有四种情况。

There are four types of plotters: pen, ink-jet, electrostatic, and direct imaging.

有四种类型的绘图仪：钢笔、喷墨、静电和直接图像。

Current thermal methods for the treatment of the above waste materials include the following four treatment systems: vitrification, plasma processing, molten metal processing and steam reforming.

目前以热方法处理上述垃圾污染物的处理系统有四种：玻璃化系统，等离子体加工法，高温熔化金属处理法，蒸气重组系统。

There are four Broad classes of turbine: water, steam, wind, and gas.

主要的涡轮机有四种：水力、蒸汽的、风力的和气体的。

An important reason, this article in profits from in the foundation which the predecessor studies, unified two languages the characteristics through the word order, the interrogative, the sentence accent and so on several aspects discussions selects it alone wanting to make a simple comparison to the

英语疑问句有四种：一般疑问句、特殊疑问句、选择疑问句、附加疑问句②，而在下面的附加疑问句中我们将主要说的是反意疑问句。

The individual's sense of truth and the group's sense of truth are combined in four ways in the text .

个体生命真理感与群体生命真理感在文本中有四种不同的组合方式。

The analysis interface of physiological signal can choose bilateral analysis, left-sided analysis or right-sided analysis in the optional mode.

生理讯号分析介面在选择模式可以选择全身性分析、左侧分析或是右侧分析，在分析模式可以有四种分析模式。

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