New words：

vouch [vaʊtʃ] v. 担保；保证；确定；断言

Sample Sentences：

Are you willing to vouch for him?
I can't vouch for it that he is in town.
I was in bed with the flu. My wife can vouch for that.

New words：

voucher [ˈvaʊtʃər] n.代金券；票券；代币券

Sample Sentences：

Can I use this voucher to pay the bill?
The vouchers will be used in dining and cinema.

New words：

achievement [əˈtʃivmənt] n.成就；成绩；功绩；完成；达到

Sample Sentences：

They were proud of their children's achievements.
It was a remarkable achievement for such a young player.

New words：

achieve [əˈtʃiv] v.完成；实现；成功

Sample Sentences：

He had finally achieved success.
You can only achieve success through hard work.
They had achieved a lot in a short space of time.

New words：

desire [dɪˈzaɪr] v.渴望；期望

Sample Sentences：

He had lost his desire to live.
We all desire health and happiness.
The medicine did not achieve the desired effect .
Fewer people desire to live in the north of the country.

achieve [əˈtʃiv] v.完成；实现；成功