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词组 per
释义 the • per • a/an

- It's £3 a kilo/per kilo. (preferable to the)
- We were doing 40km an/per hour. (Not *the hour*)
- Take this twice a/per day. (Not *the day*) (a/an for one unit of measurement; per = 'each' is emphatic and formal)
- Eggs are sold by the dozen. (Not *a/per*)
- Our car does 30 miles to the gallon. (preferable to a/per) (the in prepositional phrases)
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更新时间:2024/10/30 10:22:11