echo sampler的用法和樣例：
例句
- Soil is sampled with a core sampler.
土壤的采樣使用芯形采樣器。 - A device made of plexiglass is added between the gas absorption tube and gas flowmeter in the atmospheric sampler.
在大氣采樣器上加裝防止倒吸裝置，可防止吸收液倒吸進(jìn)入流量計。 - A depth sampler is strapped to the running board of the helicopter.
把深水取樣器固定在直升機的試驗臺上。
