It is too expensive for farmers to use routinely, and since it is not effective until a month after vaccination, administering it after an outbreak begins helps very little.

对于农民来说，按常规来使用它则过于昂贵，而且由于它在接种疫苗后一个月才有效，所以在疫情爆发后才使用几乎没有什么帮助。

youdao

Although integrating with an accounting package is the most attractive solution, it is not very popular with it staff because it has a reputation for being difficult and expensive.

尽管与计费程序包集成是最有吸引力的解决方案，但是这对于IT人员来说不是非常受欢迎的，大家都认为这种方法即困难又昂贵。

youdao

To provide that information, it is necessary to capture allocation stack traces for every object allocation, which is very expensive and is also not available in most formats of memory dumps.

要提供此信息，需要为每个对象分配捕获分配堆栈跟踪，此开销很大，并且在许多格式的内存转储中不可用。

youdao

Being able to have the replays and the production that you have on television is a good reason not to go to a game and it is very expensive.

FORBES: Maintaining Home-Field Advantage In A Digital Age

An electric car's longevity depends a great deal on how long its battery lasts, not least since it is very expensive to replace them.

BBC: Electric cars 'pose environmental threat'

But two respected financial economists conclude it is very expensive relative to the benefits it provides and may not be appropriate for many buyers.

FORBES: Should You Buy Long-Term Care Insurance? Maybe Not