而如果“好奇号”的嗅探器检测到了甲烷气体，则可以证明后者，因为甲烷是地下细菌生存的副产物。

And if Curiosity's sniffer detects methane gas, it could even imply the latter, since methane can be a byproduct of living subsurface bacteria.

youdao

土地资源的不同利用常常造成地下河的农药、化肥和细菌污染，引发雨后旱情。

So, unfit usage of land resources often causes the pollution of underground river by pesticides, fertilizers and bacteria and prevalence of dry hazard after rain season.

youdao

土地资源的不同利用常常造成地下河的农药、化肥和细菌污染，引发雨后旱情。

So, unfit usage of land resources often causes the pollution of underground river by pesticides, fertilizers and bacteria and prevalence of dry hazard after rain season.

youdao