1、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

A famous old name on a firm is not necessarily a guarantee of quality.

公司悠久的品牌并不能确保商品的质量。

There is still no guarantee that a formula could be found.

还没有把握是否能找到一个配方。

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。

为…提供质量保证；担保

Some builders guarantee their work.

一些建筑公司对其承建工程提供质量保证。

All Dreamland's electric blankets are guaranteed for three years.

所有的梦乡牌电热毯质保3年。

2、hold back

（使）犹豫;（使）退缩

The administration had several reasons for holding back.

政府因为几个原因而犹豫不决。

Melancholy and mistrust of men hold her back.

忧郁的性格和对男人的不信任使她裹足不前。

阻挡;阻止

Stagnation in home sales is holding back economic recovery.

国内销售的停滞不前正阻碍着经济复苏。

Jake wanted to wake up, but sleep held him back.

杰克想要醒来，但睡意使他又沉入梦乡。

抑制住,忍住(眼泪、笑声等)

She kept trying to hold back her tears.

她一直在试图抑制住眼泪。

He could no longer hold back convulsive laughter.

他再也忍不住，前俯后仰地大笑起来。