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1·He trudged home feeling lonely and let down.

他步履艰难地往家走，感到孤独而沮丧。《牛津词典》

2·The company now has a large number of workers who feel badly let down.

现在公司里现在有很多员工感到很失望。《柯林斯英汉双解大词典》

3·Please let down the curtain.

请把窗帘放下来。

4·Parents feel as badly let down as the young people themselves.

年轻人自己和其父母都深感失望。

5·Rapunzel let down the braids of her hair, and the enchantress climbed up to her.

莴苣姑娘垂下她的发辫，女巫顺着它爬了上去。

6·Don't let down even if the going is good.

即便在顺利的情况下也不要松劲。《新英汉大辞典》

7·This struggle is sharp and complex. We can never let down guard.

这场斗争是尖锐复杂的，我们决不能掉以轻心。《新英汉大辞典》

8·The boy let down his fist.

男孩放下了拳头。

9·Did you ever feel let down?

你曾经有觉得失望吗？

10·But we must not let down our guard.

但我们决不能放松警惕。

放下

1·The boy let down his fist.

男孩放下了拳头。

2·We should embrace our fears, let down all our borders and walls.

我们应该接受我们的恐惧，放下所有我们的边界和围墙。

3·You let down your guard, let go of everything else, because this sensation is so totally absorbing.

你放下自己的防护，放开其它一切，因为这种觉受具有如此彻底的吸摄感。

4·Please let down the blinds.

请把百叶窗放下来。

5·In those days it was considered indecent for a woman to let down her hair the way Mary did—not to mention using her hair to wipe someone's feet.

当时的人认为，女子像马利亚那样「放下头发」是不合传统的，更别说她用头发去擦别人的脚。

辜负

1·In lots of cases you have no choice but to believe and then pray for not being let down.

在很多时刻你无从选择，只能相信然后祈求自己的信任不被辜负。

2·When mankind can be evolved into a higher rank of creature and do not let down dogs' loyalty?

人类何时才能进化成更高等的动物，才不会辜负狗儿的忠心陪伴呢？