Low speed wind tunnel experiment requires strict of the wind speed, which requires a wild range of wind speed, high precision, and quick adjustment.

低速风洞实验要求对实验段的风速有严格的控制，要求风速调节范围宽，精度指标高，调节速度快。

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This article introduces an air bubble method for low speed flow visualization in water tunnel.

本文介绍一种用于低速流动显示的空气泡方法。

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The lifetime of the biodegradable mulches was 9 months and of the biodegradable low-tunnel films 6 months.

寿命可生物降解覆盖物为9个月和生物降解性低隧道薄膜的6个月。

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In return, Danes, with a krone of their own (both countries belong to the European Union, but neither uses the euro), are increasingly taking the Oresund bridge-and-tunnel into Sweden to buy low-taxed children's shoes and clothing.

ECONOMIST: Scandinavian shoppers

There was no one else in the tunnel, which was whitewashed and warm, lit by low-wattage bulbs, and branched off into small closets and locked chambers full of brooms and mops and cleaning solutions.

NEWYORKER: The Reptile Garden