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critical period
desert. 机期
earth.sc. 关键期
el. 临界周期
repr.biol. 临界时期
sport., med. 临界期
tech. 关键时期
water.res. 临界期间
critical period
: 14 phrases in 7 subjects
Agriculture3
China1
Desert science2
Finances1
Nursing2
Oil / petroleum1
Technology4