必需的

Henry Charlton Bastian was the most prominent leader of that faction of Darwinians, though Huxley was so successful in defining them out of the story that very few people today even realize that there WERE Darwinians who were serious, talented evolutionary scientists, yet also thought abiogenesis was necessary in evolution up to the present day.

巴斯蒂安。亨利查尔顿是那一派系达尔文主义者的最杰出领导者，虽然赫胥黎是如此成功将他们划出了这个故事，以至于今天几乎没有人还认识到曾经有这样一群达尔文主义者，他们是严肃的，富有天赋的进化论科学家，并且直至今日依然认为自然发生说在进化论中是必需的。

Therefore , recollections of the past become the main means of expressing life , the life instinct and local emotion become the power , the childhood leads to the pursuit of the beauty of human nature, the vision of recollections of the past cause the artist's aesthetic psychological distance , which helps their style created .

于是，忆旧成了他们的主要表达方式，"生命本能-乡土情结"构成忆旧动力，童年指向人情、人性之美的追寻，忆旧视角的运用也造成了艺术家所必需的审美心理距离，助成了他们的文体创造。

For maximum amenity and wildlife open water and a biodiversity of plants is needed.

要形成尽可能多的宜人风景及野生生物，开放的水流和植物的多样性是必需的。

The kinetochore generates the force that is essential for the complex series of chromosome movements that lead to their aligment at metaphase and segregation at anaphase.

着丝点产生对一系列复杂的染色体运动所必需的力，导致染色体中期的调整和后期的分离。

It is shown that the exogenous hormones are not necessary to initiate the androgenesis,but they can promote further growth of pollen embryoids and calluses.

外源激素对于雄核发育的启动不是必需的，但对愈伤组织进一步的生长却是不可缺少的。

Then, the required trigger signal suffices to be several microseconds and is about one-tenth of the switching period, so that the driving power is extremely small.

然后， 必需的触发器信号满足是几微秒和是开关期间的大约十分之一，以便驾驶的力量极端小。

Fish oil supplies essential nutrients that may improve your child's attention and concentration.

鱼油供应必需的营养素，可能改善您的孩子的注意力和集中力。

The amount of Zr dissolved varied with different ZrO2 particle size and therefore influenced the properties of the materials.

要使Sr-Co-Fe体系在低氧分压下维持稳定的晶相结构，一定的Zr固溶量是必需的。

India's monsoon rains, seen here lashing palm trees in Trivandrum, Kerala, bring needed water and welcome relief from the long, hot dry season.

意译：印度的季候风雨季，正在挥打棕榈树在印度特里凡得琅，喀拉拉邦，带来必需的雨水和免除长期的干旱热季节。

Nevertheless, as a result of multi-scaling behavior by Mantegna (1995) observed that a good time to describe all the changes under the market price of the model is essential.

尽管如此，由于多标度行为被 Mantegna(1995)观察到，一个好的能够描述所有时间段下市场价格变化的模型是必需的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。