There are just four kinds: adenine, thymine, guanine and cytosine.只有4种: 腺嘌呤 、 胸腺嘧啶 、 鸟嘌呤和胞核嘧啶.The DNA base composition is 32.6 - 33.1 mol % guanine plus cytosine.DNA(脱氧核糖核酸)的G+C 摩尔百分含量为32.6—33.1.It is a layer of guanine ...
The brave young man voyaged single - handed in his yacht for months.勇敢的年轻人独自乘游艇航行数月.They voyaged in sailing ship to the China Sea.他们乘坐一条帆船在中国海上航行.They voyaged for many months.他们乘船航行数月....