正从事某项工作,忙碌著;在现场
on the job adj 1: actively engaged in paid work; "the working population"; "the ratio of working men to unemployed"; "a working mother"; "robots can be on the job day and night" [syn: {working(a)}, {on the job(p)}] 2: watchful and prepared for action; "bird watchers on the alert for a rare species"; "cops were on the job and caught them red-handed" [syn: {on the alert(p)}, {on the job(p)}]