be hot on somethinginformal a) KNOW somethingto know a lot about something 通晓[熟知]某事物 He’s pretty hot on aircraft. 他对飞机很精通。
b) STRICT British EnglishBrE to be very strict about something 对某事要求很严格 SYN tight The company is very hot on security. 该公司戒备森严。
be hot on something• Once again Biddy / Beth flees, but both the Toddler and McGarr are hot on her trail.• The flies buzz and the sun is hot on my spine.• Young Laura is hot on the heels of her brothers.• It was hot on the top and cold in the middle.• But they were hot on the trail of a loathsome whine as the party in another mess pined for better days.
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