Parastratigraphy
副地层学
🗣️ 情景例句
Quit whining.
别诉苦了。
We feel your product is too specialized for mass marketing.
我们认为你们的产品对广大市场而言太专业化了。
Finding planets is proving hard enough, but finding life on them will prove infinitely more difficult.
寻找行星证明相当困难，但是要在行星上发现生命会变得无比艰难。