必需的

The main selling varieties are: Trees category, type of flowering shrubs, tree type, color categories, hedge type, ornamental bamboo, bonsai type flowers, flower Lei category Flacourtia category by category, type of lawn grass, flower festivals, such as total 23 major categories of more than 800 species, nursery stock, and has introduced a comprehensive range of new varieties, products, and more adapted to the northern, western cold climate, soil salinization, soil drought and other adverse natural environment, so best-selling nursery stock throughout the country.

国腾花卉苗木园艺场于2003年在宿迁市沭阳县工商局合法认证注册，注册资金480万元，主要是借助我们沭阳&中国花木之乡&40万亩苗木集产区的优势，致力于抗盐碱耐干旱苗木及彩叶新品种的推广以及各类园林造景必需的国家二级保护树种。主要品种有：行道树类、花灌木类、乔木类、色块类、绿篱类、观赏竹类、花卉盆景类、花篱类、刺篱类、地被类、草坪草种类、节日草花等共达23大类800余种，苗木品种齐全且不断推出新品种，产品多适应北方、西部气候寒冷、盐碱性土壤，土质干旱等恶劣的自然环境，所以苗木畅销全国各地。

"Fresh elections are necessary but not possible under the current environment," Frazer told reporters.

&在当前的形势下，新的选举是必需的但尚不合理的。&Frazer告诉记者。

Accessories can make or break the coffee drinking experience and cappuccino lovers will agree that a frother (a pipe which passes steam which creates the froth in the coffee) is as essential as an in-built bean crusher.

配件还是可以喝咖啡的休息和经验氲迷同意起泡(其中一管合格汽制造泡沫的咖啡)仍是必需的，在建的豆腐破碎。

Preliminary bioassay showed that all the synthesized compounds just showed a poor inhibition rate (0~45%) at 500 mg/L, much weaker than (72%~87%). The result suggested that chloro-atom on 2-position of pyridine ring may be indispensable for herbicidal activity.

初步除草活性测定结果表明，在500mg/L剂量下，所有化合物的除草活性（抑制率0~45%）远低于先导化合物（抑制率72%~87%），说明吡啶环2-位上的氯原子可能对维持该类化合物的除草活性是必需的。

The hereditability of chest diameter is the largest both in half-sib families and clones.N, P and K are three necessary nutritive elements of all plants, which are very important to the growth of plants.

在两片测试林中都以胸径的遗传力为最高，说明胸径在白榆中是遗传性最强的一个性状。N、P、K是一切植物生长所必需的大量营养元素，对植物的生长起着重要的作用。

To gain an ideal algorithm, based on the theories of rough set and granular computing, the basic algorithms of indiscernibility relation and computing positive region were designed, in which dynamic SQL was used to directly get the sorted object sets so that the sort algorithm was left out.

摘 要：为获取高效算法，结合Rough集和粒计算理论，基于知识颗粒设计出获取等价类的算法及计算正区域的等价算法，使用动态SQL语句直接获取已排序的对象集，省略类似算法必需的排序算法，降低了实现的复杂度。

Buckwheat is rich in oleic acid, linolic acid, rutin, bitter principle, trace element and all kinds of amino acid human needs.

荞麦是二十一世纪的健康营养食品，荞麦本身富含油酸、亚油酸、芦丁、苦味素及人体所需的微量元素和必需的各种氨基酸，在国内被推崇为调节人体均衡营养的时尚佳品。

Ideally, true mesial, distal, facial and lingual measurements are required, but this is possible only where teeth are missing, so that unimpeded access to these surfaces is possible.

理论上，准确的中央，末端，面部和舌部测量都是必需的，但是这仅仅是在牙缺失的地方，因此畅通无阻的进入这些表面是可能的。

A bird zeroing in on a flag-footed bug perched on a passionflower might see the flutter of red "flags"—the insect's attempt to divert the hunter's bite to nonessential limbs, away from its vital core.

一只鸟瞄准在一只标志-有脚的昆虫栖息在一朵西番莲上可能看见的红色&标志&――昆虫企图转移猎人的啃咬那非必需的四肢，离开它至关重要的果心。

The insect chitinase, belonging to glycohydrolase 18 family, is required for chitin recycling and synthesis of new cuticles or peritrophic membranes.

昆虫几丁质酶属于18族糖苷水解酶，是昆虫蜕皮过程中降解旧的几丁质必需的酶，干扰或破坏几丁质酶的活性都可以影响昆虫的正常生长发育。

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