必需的

At the same time, all of the necessary software to support and abstract these functions are provided.

在同一时间，所有必需的软件，以支持和抽象这些功能。

To be used with Smart Media, an adaptor is required.

可用于智能媒体，适配器是必需的。

This is an essential part of the ageing process.

这是酒在成熟过程中必需的一部分。

Air,as well as water,is need to make plants grow.

空气和水一样是植物生长所必需的。

Air as well as water is needed to make plants grow.

空气同水一样，是植物生长所必需的。

Air, as well as water, is needed to make plantsgrow.

空气同水一样，是植物生长所必需的。

To better understand the roles of LsrA protein in nodulation, a series of analyses of nodules using scanning electron microscopy, genetic and biochemical approaches have been carried out. Our analyses suggest that the lsrA1 nodules contain bacteroids in the invasion and establishing zone only. The lsrA gene expression is active early in the invasion zone and activated later than bacA genes. The lost of LsrA protein dramatically reduced the expression of nifA and fixK, and completely blocked the expression of the nifH gene for nitrogenase. LsrA protein functions early in the bacteroid development and it is essential for the development nitrogen fixing bacteroids.

前期的工作中，苜蓿中华根瘤菌Rm1021中90个候选LysR基因已经被定向插入突变，并筛选在自生生长时期、共生生长时期的表型，以期寻找更多在自生状态或共生固氮中有功能的LysR转录因子。1 针对前期鉴定出的共生固氮必需的lsrA基因，我们应用了一系列扫描电子显微镜技术、生物化学、分子遗传学等方法，发现lsrA基因主要在根瘤侵染区开始表达，表达时序也在侵染阶段左右，但晚于bacA基因表达；LsrA蛋白缺失后根瘤固氮区中缺乏具有固氮能力的类菌体，nifA和fixK基因的转录水平降低，nifH基因的转录被完全阻断，因此LsrA蛋白为根瘤发育所必需，是新的根瘤发育信号传导途径成员。2 通过表型筛选我们鉴定了苜蓿中华根瘤菌的oxyR基因，并研究了它的调节特性。oxyR突变后，苜蓿中华根瘤菌对过氧化氢敏感性提高，适应性降低。

In the second place, they may be of different kinds depending on whether they assert that a certain practice is necessary, sufficient, or neither necessary nor sufficient but still helpful, for the fostering of the disposition referred to in premiss, or simply that it is more effective in doing so than other methods are; and the conclusion in must be understood differently, depending on which of these claims they make, though the argument may in each case be read as establishing that the practice in question has some value or desirability.

其次，它们可能属于不同的种类，依赖于它们是否声明一种特定的实践是必需的、足够的或既不必需又不足够但仍然是有助的，因为就要培养的性状在前提中已经涉及，或简单地说它这样做比别的方法是更有效的；而且，中的结论，必须依赖他们提出的是这些声明中的哪一个，被进行不同的理解，虽然，关于问题中提到的实践，是有一定价值或是让人心满意足的争论，如在建立时那样能够在每一个例子中被读到。

Article 18 The capital investment necessary for the conditions for the safe production of the production and business operation entities shall guaranteed by the decision-making organ and major persons-in-charge of the production and business operation entities or the investors of the private enterprises who shall be responsible for the aftermaths of insufficient capital investment necessary for safe production.

第十八条生产经营单位应当具备的安全生产条件所必需的资金投入，由生产经营单位的决策机构、主要负责人或者个人经营的投资人予以保证，并对由于安全生产所必需的资金投入不足导致的后果承担责任。

Unsaturated fatty acid in the seeds of those three species were abundant and its total content is over 89%.18 kinds of amino acid were detected,8 of which are essential amino acid.Nearly all kinds of mineral elem...

3种栝楼种子都含有大量的不饱和脂肪酸，不饱和脂肪酸总量均在 89%以上；氨基酸共检出 18种，必需氨基酸有 8种，占氨基酸总量的 2 9%以上；矿质元素种类齐全，高 K低 Na的特点明显，以 Ca的含量较高，人体必需的 Fe、 Mn、 Cu、 Zn等微量元素的含量分别在 2 0 1、 5 6、 2 3、 6 8以上。

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。。。。