To see someone or something very briefly or suddenly.

突然地，粗略地看到某人或某物

I didn't so much as catch sight of him all day long.

我一整天都沒(méi)見(jiàn)他人影。

I walked slowly, casually, hoping she would catch sight of me.

我裝作滿(mǎn)不在乎地款款而行，希望她會(huì)一眼看到我。

Keep looking up, and you may catch sight of some unexpected creatures.

繼續(xù)觀察下去，說(shuō)不定會(huì)看到意想不到的動(dòng)物。