offer to do sth
take initial to do sth. 主动做某事
apply oneself to （doing）sth to be intent on sth (absorbed in) to be intent on doing sth (determined) be engaged in doing something be buried in something concentrate on doing sth be involved in doing sth be engaged to do sth
Concentrate on doing 最佳另有get down to get on the ball be weded to也有其意思！不懂得可以有道一下！
be concentrate on doing sth.
do something of one\'s own accord
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