Depending on that, suggest place a dispersive sensor upside down at the wellhead and a suction sensor at the cellar to test the hydrogen sulfide concentration accurately.

针对以上情况，建议在井口处安装倒置放置的扩散式传感器，方井处安装吸入式传感器。从而能更准确检测硫化氢浓度。

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Do not place it upside down during transportation to avoid overflow of mercury.

搬运过程中切勿倒置，避免水银溢出。

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It is also for this reason that our species continues with an underwater form of vacuum traction that propels us from one place to another including upside down or straight up walls and rocks.

也正是这个原因，我们种族继续保持了一种水里的真空牵引结构来推动自身从一处行进到另一处，包括在墙和岩石上以垂直向上或是上下颠倒的方向爬行。

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To dry parsley, tie the plant stems together and hang them upside down in a warm, dark,airy place.

VOA: special.2009.06.02

The traditional Confucian order had been flipped upside down, and a symbolic transfer of power from elders to youth took place.

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