need for

例句与用法

They perfected their plans during the day and there was no need for words .
他们在白天已把计划商量妥当，因此这会儿用不着开口说话。
There is an urgent and continuing need for improved broad-spectrum control methods .
改进广谱性的防除方法是急待解决的一项迫切任务。
All of the repairs needed for the television set were covered by its guarantee .
电视机所需要的全部修理费用都因为有保修单而免收了。
Detergent use will not eliminate a possible need for exhaust fans and air scrubbers .
采用净化剂并不能排除设置排气风扇和空气洗涤器。
The number of ions needed for screening the electrical field is known as the coordination number .
屏蔽电场所需要的离子数称为配位数。
There may be a need for retarding growth chemically to keep trees within bounds .
可能需要用化学剂抑制生长，使树冠保持在一定的范围内。
Early rigor mortis and rapid autolysis indicate the need for prompt necropsy examinations .
早期尸僵和迅速自溶解提醒必须迅速进行剖检。
He had expressed his sense of urgency about the need for dramatic new recommendations .
他表达了有必要提出激动人心的全新建议的迫切心情。
The reaction is also characterized by the need for two equivalents of hexamethylphosphoramide .
此反应的特点是要用2个当量的六甲基磷酸胺。