Special dyes may be instilled in the eyes to better observe tear flow and to highlight any changes to the outer surface of the eye caused by insufficient tears.

这项检测，灌输到眼睛里面的特殊染料可以帮助我们更好地观察眼泪的流动，并且能够标记因少量眼泪儿产生的眼球外表面的变化。

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There is an urgent need to understand the internal flow slurry pump to improve the design methodology, improve pump efficiency and reduce pump wear and tear.

因此迫切需要了解渣浆泵的内部流动规律，改进设计方法，提高泵的效率，减少泵的磨损。

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The researchers who developed Tropolis said they worked closely with moms and kids to tweak the texture so that it would flow through the tear-off opening.

WSJ: PepsiCo's Tropolis Fruit Puree an Attempt to 'Snackify' Drinks