CF4造句怎么写

4、NF3具有相对短的大气寿命（740年），比C2F6和CF4.更容易分解。HF最终扩散到大气中，在大气中它通过湿沉积被除去。

2、The optical emission spectrum of r. f. plasma during amorphous silicon based film etching in CF4 gas is detected.

1、Study on the Improvement of Ashing Rate of Photoresist Ashing Process with CF4 Gas;

3、NF3 has a relatively short atmospheric lifetime (740 years) and dissociates more readily than C2F6 and CF4. HF ultimately diffuses down to the troposphere where it is removed by wet deposition.