Mendelian gene is not a real physical entity but an abstraction or symbol.孟德尔式的基因并不是真正的实体,而是抽象概念或者是说明性的符号.It is rather disappointing that so few of the features show clear - cut Mendelian pedigree patterns.颇使人感到失望的是,只有很少...
我指甲根部的表皮龟裂粗糙，指甲被咬得参差不齐。My cuticles were split and ragged, and my nails unevenly bitten.她试图给他剪指甲，他不让。When she had attempted to cut his nails he resisted.我用拇指指甲把台灯上的螺钉拧紧了。I used my thumbnail to tighten the screw on my lamp...