例句與造句

1. the vertical distribution of particle concentration is nearly linear, and the concentration at the bottom is 3 times larger than that at the top, which indicates that ca, the reference concentration of suspended particles in einstein's equation, is larger
   2u*；顆粒的濃度沿垂線基本為線性分布，底部比上部大3倍左右，說明einstein取的懸移質(zhì)參考濃度ca會有所偏大。
2. It's difficult to find reference concentration in a sentence. 用reference concentration造句挺難的