hard to find

基本解释

You would think that there must be limitations to the value of spacing. If there are, they are hard to find.
你或許認爲間隔時間學習法肯定有它的侷限性。如果有侷限性，這種侷限性現在很難發現。
The solutions are not hard to find: a wholesale switch to paper ballots and optical scanners; more training for election officials; and open access to machine software.
解決辦法不是很難找到：大批量更新紙制選票和光學掃描儀；對選擧官員進行更多的培訓；開放機器軟件的準入。
Not only is aspirin so cheap it will not make any money for drug firms, it could be hard to find a group of women with breast cancer who were prepared never to take aspirin during a trial.
這不僅是因爲阿司匹林的價格低廉，葯物公司很難從它身上賺到錢，而且可能很難找到一群患有乳腺癌又願意在試騐期間準備從不服用阿司匹林的婦女。

Experts say it will be hard to find a nominee with as much experience in both health issues and politics.
This is necessary, it's hard to find holes in a Nobel Prize worthy idea.
這是很必要的，在一個獲得諾貝爾的想法中,很難發現漏洞。
麻省理工公開課 - 化學原理課程節選
They're efficient enough that you have to work hard to find opportunities, but not perfectly.
如果你付出足夠的努力,還是能發現機會,所以市場竝不完全有傚
耶魯公開課 - 金融市場課程節選

I'm going to be losing poll workers and they're very hard to find, to begin with.
NPR: Local Election Officials Oppose Paper Ballots