结果表明：不同直径大小的横走侧根均由周皮、次生维管组织和四原型的初生木质部构成。

The results showed that all the cross branch roots of different sizes consisted of periderm, secondary vascular tissue and tetrarch primary xylem.

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在一项实验中，一种原型呼吸检测仪不仅检测出了癌症，还能区分其常见的四种类型：肺癌，肠癌，乳腺癌和前列腺癌。实验虽小，却很成功。

In a small but successful study, a prototype breath test was able not only to detect cancer, but also to differentiate between the four most common forms of cancer: lung, bowel, breast and prostate.

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从建立验证概念的原型到实现一个功能完整的方案的过程大约需要三、四个月。

The process — from establishing a proof-of-concept prototype to realizing a fully functional solution — may take three to four months.

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