双胞胎 twin ; The Twins ; twin brother
连体双胞胎 conjoined twins ; Siamese twins
同卵双胞胎 identical twins ; monozygotic twin
异卵双胞胎 fraternal twins ; Non-identical
扭曲双胞胎 TwistedTwins
双胞胎之一 twin
双胞胎姐妹 twin sisters ; a twin sister
读书的鲍勃西双胞胎 The Bobbsey Twins at School
每次都是双胞胎 Twins every time
龙凤大双胞 Jack and Jill
如果同卵双胞胎彼此在疾病方面比异卵双胞胎更相似，那么这种疾病的易感性至少在一定程度上是由遗传造成的。
If identical twins are more similar to each other with respect to an ailment than fraternal twins are, then vulnerability to the disease must be rooted at least in part in heredity.
超声波扫描显示她怀了双胞胎。
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