Efficiency in grain production isn't an option—it's a necessity.
To supply an explicit moral tag to an evolving and compulsive dramatic image seems to me facile, impertinent and dishonest.
The most pleasing of all sounds, that of your own praise.
高分子物质的性质不仅取决于其构建单元的性质,还取决于这些单元在空间中的排列方式。
"The best stories are the ones that make you feel hopeful."