She'd sometimes sink into depression...是什么意思？

She'd sometimes sink into depression...

她有时会陷入忧郁之中。

sometimes

adv. 有时，间或，时

例句
I want to work at home on a Tuesday but as it turns out sometimes it's a Wednesday or a Thursday.
我想周二在家工作，但实际上有时却是周三或是周四。

sink

vi. 淹没，下落，退去，渐渐进入；vt. 使下沉，使下垂，砸入地面，使败落；n. 水池，洗涤槽，污水坑；

例句
Environmental groups are up in arms about plans to sink an oil well close to Hadrian's Wall.
环保组织极力反对在哈德良长城附近打油井。

into

prep. （表示方向）进入…中，（表示所属）输入，（表示状态）进入…状态，（表示时间）持续到；

例句
By 1838, the abolitionists had shamed parliament into ending slavery in British colonies...
到1838年，废奴主义者迫使议会出于道德压力而废除了英国殖民地的奴隶制。

depression

n. 萎靡不振，沮丧，下陷处，坑，衰弱，减缓；

例句
It seems as if the blanket of depression is in some way necessary to help them blot out the even greater pain of real life...
似乎这种弥漫的抑郁情绪多少能帮助他们忘却一些现实生活中更大的痛苦。