offer oneself;come forward of one's own accord to proffer;offer one's free services;offer to take the responsibility upon oneself;come forward ;

Right. What I want now is two volunteers to come down to the front.
好了,现在我需要两个自告奋勇的人到前面来。
来源:《柯林斯高阶英汉双解学习词典》Eric's sister had nobly volunteered to help with the gardening.
埃里克的姐姐真好,自告奋勇帮助收拾花园。
来源:《柯林斯高阶英汉双解学习词典》He volunteered to come Atayal community to teach English for three years.
他自告奋勇,来这个偏远的泰雅族部落教英文,而且一教就三年.
来源:互联网摘选He sat patiently, holding me fast until a passer-by stopped and offered help.
他耐心地坐着, 紧紧地抱着我,后来有一位 过路人 停了下来,自告奋勇帮忙.
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