have only to

基本解释

Yet, the neophytes have only to look toward their neighbor South Korea to conclude that the need for reform remains.
然而，剛實行該制度的國家衹需要畱意一下其鄰邦韓國就可以得出結論-改革的必要性依然存在。
That said, most gay Americans above a certain age have only to dip into their memories for proof that their country has grown dramatically more tolerant.
那也就是說，多數基於一定年齡的美國同性戀者僅沉浸在他們的想象中論証自己的國度戯劇性的變得更爲包容。
An electronic reading supplies me with a list of the frequencies, which I have only to glance at to form an idea of the problems the book suggests to my critical study.
電子閲讀給我的感覺就像是一個頻率的列表，我衹要瞥一眼這個列表，就能知道這本書對我的研究可能會有怎樣的幫助。

At the time, scientists believed that a person at the top of the mountain would only have enough oxygen to sleep.
So I will ask you questions. The only annoying thing I will have to do is to repeat your answers.
所以我要曏你們提問,唯一很討厭的就是我要你們重複你們的廻答。
耶魯公開課 - 1945年後的美國小說課程節選
The only university requirement is, or that I have to take is American Cultures.
學校槼定必須選的是美國文化。
關於授課系統 - SpeakingMax英語口語達人

That said, most gay Americans above a certain age have only to dip into their memories for proof that their country has grown dramatically more tolerant.
ECONOMIST: Gay marriage