另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.嘌呤为嘧啶取代或嘧啶为嘌呤所取代,叫做颠换.The substitution of a purine for a pyrimidine, or vice versa is a transversion.本文研究氟脲嘧啶(5—...
Objective : To study afferent projections from the diencephalon and brainstem to the orbital cortex ( OC ) .目的: 研究 间脑 和脑干至眶皮质的传入投射.Their sales projections are a total thumbsuck.他们的销售量预测纯属估计。The red marks of the wings and...
NEW SPECIES OF LYGUS BUGS FROM CHINA ( Hemiptera: Miridae )丽盲蝽属的新种 ( 半翅目: 盲蝽科 )A NEW SPECIES OF THE GENUS PHYTOCORIS FALLN ( HEMIPTERA, HETEROPTERA, MIRIDAE )植盲蝽属一新种记述 ( 半翅目, 异翅亚目, 盲蝽科 )TWO NEW SPECIES OF GENUS BRYOCORIS...
狗露出獠牙.The dog bared its fangs.山顶很尖,在天空的衬托下好像一排排獠牙.The tops the hills stood sharply like against the sky.博吉那双棕色眼睛看着我, 高兴地喘着粗气, 张开长着獠牙的嘴,吐出粉红的舌头.Bogy, brown eyes regarding me, panted happily, pink tongue peeking from tuske...