in necessary of信息详情
必要时
in necessary───必要时
necessary───n.必需品；adj.必要的；必需的；必然的；n.(Necessary)（英）内塞瑟里（人名）
if necessary───如果必要的话；如必要的话
not necessary───不需要；不必要
necessary skills───必备技能
no necessary───没有必要
absolutely necessary───绝对必要；不可或缺；不可缺少；必不可少
necessary evil───n.无可避免之灾祸；n.不可避免的灾祸
necessary elements───必要要素
They believe such a diet which includes no products from animal sources can be deficient in many of the necessary vitamins and minerals our bodies need.───他们认为，这样的饮食不包括任何动物来源的产品，会缺乏我们身体所需的许多必要的维生素和矿物质。
Active play may provide necessary stimulation to the growth of synaptic connections in the brain, especially the cerebellum, which is responsible for motor functioning and movements.───积极游戏行为可能为大脑突触连接的生长提供必要的刺激，尤其是在负责运动功能和运动的小脑。
friendly nod or a wave of acknowledgement in response to an act of courtesy helps to create an atmosphere of goodwill and tolerance so necessary in modern traffic conditions.───礼貌行为的友好点头或挥手表示感谢有助于创造带有善意的宽容氛围，这在现代交通条件下是非常必要的。