But every now and then, 但不时地

333. It's her cub,
     是幼崽
334. taking her first steps towards adulthood and independence.
     开始了迈向成年和独立的第一步
335. She is unlikely to see her mother again.
     幼崽大概很少有机会与母亲重逢了
336. But every now and then,
     但不时地
337. they will be reunited through the messages they leave
     他们会通过在岩石上留下的信息
338. on the marking rocks.
     间接地团聚
339. Her mother has succeeded in raising her,
     幼崽虽被母亲成功养大

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 336 行