1、sustain

使持续;保持

But he has sustained his fierce social conscience from young adulthood through old age.

而他从青年时期一直到老年都始终保持着强烈的社会良知。

The parameters within which life can be sustained on Earth are extraordinarily narrow.

地球上生命可以存活下来的地域范围是非常狭小的。

经受;遭受;蒙受

Every aircraft in there has sustained some damage.

那里的每架飞机都受到了一些损坏。

A seventeen-year-old tourist died late last night of injuries sustained in yesterday's bomb blast.

一位 17 岁的游客在昨天的炸弹爆炸中受伤并于当天深夜身亡。

支持;支援;救济

The cash dividends they get from the cash crop would sustain them during the lean season.

从经济作物中获得的收益能帮助他们度过不景气的时期。

I am sustained by letters of support and what people say to me in ordinary daily life.

这些支持的信件和人们每天对我的鼓励一直支撑着我。

2、guarantee

确保；使必然发生

Surplus resources alone do not guarantee growth.

仅有富余的资源并不能确保发展。

a man whose fame guarantees that his calls will nearly always be returned.

其名望能确保他的呼吁几乎总能得到回应的人

保证…必定发生；承诺做；答应提供

Most states guarantee the right to free and adequate education.

大多数州都保障人们免费享受充分教育的权利。

All students are guaranteed campus accommodation for their first year.

保证安排所有的学生第一年在校内住宿。