对于有相对简单的，不定向的相互作用的液体，像有机液体，可能会有范德瓦耳斯相互作用。

For liquids with relatively simple non-directional interactions, things like organic liquids that might interact van der Waal's interactions.

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中波天线大部分采用铁塔天线，非特殊地形或特别要求的服务区外，均采用不定向天线。

While mid-wave antenna is mostly iron tower antenna, we do not use directional antenna except that we need special service in special area.

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得到的突变株遗传稳定性良好，克服了诱变随机筛选的不定向性和盲目性，提高了育种的工作效率。

The selected mutant has a good genetic stability. It overcomes uncertainty of random selection and the blindness, and increased the efficiency of strain breeding.

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This stem cell which is reproduced still has the potential to undergo asymmetric division but this one does not.

新生成的干细胞,仍然有潜能进行不对称分裂,但定向祖细胞就不行

耶鲁公开课 - 生物医学工程探索课程节选

One result of this asymmetrical division is a committed progenitor cell.

这种不对称分裂的一个结果,是产生定向的祖细胞

耶鲁公开课 - 生物医学工程探索课程节选