The infrared gas sensor contains an open-path gas chamber, a high SNR (signal to noise ratio) infrared detector, and an electrical modulated MEMS infrared emitter.

红外气体传感器采用开放式气室，选用高信噪比的探测器和电调制的MEMS红外光源。

youdao

The path leads past an open field covered with huge rocks, through a group of tall spruce trees, and past a field of blueberry bushes.

VOA: special.2009.07.20

(Speaking) President Obama visited South Korea in November, and reminded the North the path to dialogue remains open.

VOA: standard.2009.12.30

Russia had "very clearly and consistently explained" that it would not accept a resolution that "would open the path for pressure of sanctions and further to extend military involvement in Syrian domestic affairs, " said Vitaly Churkin, Russia's ambassador to the United Nations.

CNN: Syria shows al-Assad, amid speculation on his whereabouts

Walk across a stone path, open your office door, fire up your computer and get to work.

FORBES: Why Your Home Office Should Be In The Backyard

Think about that. (Applause.) That path is open only if you take it through your vote.

WHITEHOUSE: The White House