延缓衰老的英文：
postpone senility ;prevent senescence

参考例句：

Calcium apparently acts in a similar manner as some of the hormones that defer senescence.
钙这种明显的作用同某些激素能够延缓衰老的作用方式相似。

Delay the process of decrepitude
延缓衰老

Delay senility
延缓衰老

Delay the process of aging
延缓衰老

Doing this kind of ' Qigong" half an hour every day can delay senility.
每日做这种气功半小时，延缓衰老。

Healthier eating, longer lifespans and higher disposable incomes have helped to hold back the years.
虽然健康的饮食、命的延长和较高的收入对于人们延缓衰老起到了一定的作用。

It not only can help people being healthy, full of energy, but also can postponing aging.
不但可以使人保持良好的身材、充沛的精力，而且可以延缓衰老的到来。

postpone是什么意思：
v. 使延期；延迟；把...放在后面

The match was postponed on account of the weather.
基于天气关系，比赛延期进行。

They postponed sending an answer to the request.
他们推迟了对这一请求的答复。

In the event of rain, the game will be postponed.
要是下雨，球赛就延期。

senility是什么意思：
n. 高龄,老迈,老态龙钟

Infirm,feeble,and often senile.
蹒跚的虚弱的，衰弱的，因老而糊涂的

A foolish,eccentric,or senile person.
傻瓜一个愚蠢、古怪或衰老的人

He may belong to senile residents who stray from home.
他可能是那种离家迷失在外的昏聩老年人。

prevent是什么意思：
v. 阻止，妨碍；防止

To neutralize a city to prevent bombing.
宣布某城市中立以避免被轰炸。

Prevention is better than cure
预防胜于治疗

This has proved an effective preventive.
这种药证明是很有效的预防剂。