7'

Sometimes that thing you're searching for your whole life, it's right there by your side all along.
—— Guardians of the Galaxy
有时，你终其一生所追求的，其实一直就在你身边。
——《银河护卫队2》

that thing连在一起，前者是[ð]，后者是[θ]，有相当难度，要多加练习。（类似的还有this thing，也很难，尤其是Is this thing on? 这句话）

search for等于look for，也可以说seek，但不能说seek for
这句台词比较口语化，所以没有太讲究语法。

严格说来，that thing you are searching for your whole life就是it，所以后面不应该接it's，应该直接用is：Sometimes, that thing you're searching for your whole life is right there by your side all along.