identical twin
US /aɪˌden.tɪ.kəl ˈtwɪn/
UK /aɪˌden.tɪ.kəl ˈtwɪn/
1.
一卵性双生児
either of two fetuses or children born at the same birth who have developed from the same ovum and are therefore always of the same sex and usually very similar in appearance
:
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My cousins are identical twins; it's hard to tell them apart.
私のいとこは一卵性双生児で、見分けるのが難しいです。
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She gave birth to a pair of healthy identical twins.
彼女は健康な一卵性双生児を産んだ。