我学会了如何称出袋装种子的重量。I learned how to weigh out packages of seed.正如我们所说，科学家正在试验努力寻找让种子的生命力更加延长的方法。Scientists are experimenting to find ways to ensure the viability of seeds for even longer periods of time.乙醛酸循环体发现于油脂种子的贮藏组织中....
The professor is drudging at dictionary-compiling.教授正在辛苦地编字典。Compiling a dictionary is an awful sweat.编字典是一项非常艰苦的工作.The professor is drudging at dictionary - compiling.教授正在辛苦地编字典.to assist in compiling a dictionary参加(或帮助...