1.我向你保证，今天就开始戒烟。

    「原句」I give you my word. I'll quit smoking today.「解说」I give
you my word.意思是“我向你保证，一言为定”，泛指没有白纸黑字的口头承诺。

    要赢取对方信任，还有其它不同的说法，如：I promise.我向你保证。/ I
swear.我发誓。/ Believe me. 相信我吧。

    2.他有胆量当众指责老板。

    「原句」He had the nerve to scold his boss in public. 「解说」have
the nerve for/to do sth.，也可以说have a nerve或者have some nerve ，有
勇气做某事，有胆量做某事。

    3.除非事关生死，否则别打搅我。

    「原句」Don't disturb me unless it's a matter of life and death.「
解说」a matter of life and death - something that is very important or
serious 生死攸关之事，非常重要或严肃的事

    4.金钱随来即去，好名声却会伴你长久。

    「原句」Money will come and go but a good name will carry you far
in life.「解说」come and go 来来往往，转瞬即逝。Money will come and go.
也可以翻作“钱乃身外之物”。

    5.在被判持械抢劫罪后，他度过了十年牢狱生活。

    「原句」He spent ten years behind bars after being convicted for armed
robbery.「解说」behind bars 坐牢，在监狱服刑

    6.整座城市里到处都有街头音乐人演奏着圣诞乐曲。

    「原句」There were street musicians all over the city playing Christmas
tunes.「解说」tune是“曲调，旋律”的意思，要表达“演奏合调”我们可以说
play in tune，相反“不合调”就是play out of tune.

    7.老实说，我对中期选举毫无兴趣。

    「原句」Honestly speaking ， I couldn't care less about the mid-term
elections.「解说」couldn't care less用来表达对某事一点也不在乎，一点也
没兴趣；相反，couldn't care more就表示很在乎，相当于care a lot.