其中的一些，如蜗牛的腺粘液，很难获得，而且极其昂贵。

Some of these, such as the glandular mucus of snails, were difficult to obtain and outrageously expensive.

youdao

在北非的许多国家，如苏丹和利比亚，签证很难获得，而且这里给背包者的供应也很少。

In many countries in the north, such as Sudan and Libya, visas are hard to obtain, and there is little provision for backpackers.

youdao

缺乏资助的调控部门将很难获得最优秀的毕业生，而且对才华横溢的年轻人认为值得学习的事情影响也甚微。

Under-funded regulatory agencies will struggle to compete for the most talented graduates and will have only a marginal impact on what those talented young people think is worth learning.

youdao