un·der·take/ˏʌndə`tek; ˌʌndəˈteɪk/ v [T] undertook /-`tk; -ˈtʊk/ , undertaken /-`tekən; -ˈteɪkən/ , undertaking formal 【正式】 1 to start to do a piece of work, especially one that is long and difficult 着手做〔尤指长时间而艰苦的工作〕: Baker undertook the task of writing the report. 贝克开始写那篇报告。 2 undertake to do sth to promise officially to do something 承诺做某事