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They left by twos and threes.他們?nèi)齼蓛傻仉x開(kāi).The students are coming into the classroom by twos and threes.學(xué)生們正三三兩兩地走進(jìn)教室.They came in by twos and threes.他們?nèi)齼蓛傻剡M(jìn)來(lái)....

兩個(gè)兩個(gè)地，成雙地...

by twos的音標(biāo)：...