大约 1.(约略) approximately; about 大约半小时路程。 it's about half an hour's journey.2.(可能) probably 他大约是到北京去了。 he has probably gone to beijing
等于 1.(相等) equal to; equivalent to; equal; be worth; the equal of sth.; be the same with; bear an equivalence 四加二等于六。 four plus two equals [is] six.2.(几乎就是) amount to; be tantamount to; correspond to; as much as 他的回答等于拒绝。 his answer amounts to a refusal