偶尔发现 meaning in Chinese

run across (sth)

About this time i met with an odd volume of the spectator .
大约此时，我偶尔发现一卷残缺不全的《旁观者》报。
He come across this in a curio shop
他在一个古玩店里偶尔发现了这个。
In addition can find the material of mountain with cover once in a while near growing the crack of the jade ore body originally , this oxidizes taking shape because of the secondary too
此外在原生玉矿体的裂隙附近也能偶尔发现带皮的山料，这也是由于次生氧化形成的。