英语语法分析

One called TNA replaces RNA’s ribose sugar with a sugar called threose.

取代RNA核糖的物质叫做“TNA”（苏糖核酸），带有苏糖。

The ribose of one nucleotide joins with the phosphate of the next to form the RNA backbone.

一个核的核糖和下一个磷酸盐相连，形成核糖核酸的支柱。

The most important representatives of monosacchrides are glucose, arabinose, galactose, mannose, ribose, and fructose.

最有代表性的单糖是葡萄糖、阿拉伯糖、半乳糖、甘露糖、核糖和果糖。