例句與造句

1. This separation step is rather lengthy and cannot always be achieved, due to a high residual content of pyrite in the kerogen .
   由于油母質(zhì)中黃鐵礦的剩余含量較高，這個(gè)分離過程相當(dāng)長(zhǎng)，而且總是不能達(dá)到。
2. It's difficult to find residual content in a sentence. 用residual content造句挺難的