01. account for
[1]說明(原因等);
EG: His illness account for his absence from school.他因病未能去上學(xué)。
That accounts for it.原來如此。
[2](將保管的款項)記賬;[3]對……負責(zé)( answer for )。
02. add up to
[1]合計,總計(amount to ,count up to );
EG: These figures add up to 117.
[2]結(jié)果。