The nutrients are deep down in the active layer anyway, not high up near the surface, which is the part of the active layer most affected by run-off.(不管怎樣，營養物質存在于活性層深處而不是在表層附近，活性層受徑流影響最大的地方。)

But he says deep down he was getting lonelier and lonelier.(可是，他說，內心深處卻越來越孤獨和寂寞。)

We tend to ignore intuition even though deep down we often know the truth.(我們時常忽略了直覺，即使內心深處我們明了真相。)

They know, deep down, that they can do it. They just don’t know how.(他們都堅信他們能做到，只是他們不知道怎樣做。)

Some plants store reserves of water to see them through a drought; others send roots deep down to subsurface water supplies.(有些植物會儲存水分，以度過旱災；另一些則將根深深地扎入地表，延伸到地下的供水系統中。)

Deep down, however, I'm very grateful to this test.(不過在內心深處，其實我又很感激這個考試。)

Even though we may still be soft deep down, that's not what others see.(盡管我們內心依然溫柔，但是別人卻看不到。)

Probably floating in the sky, or deep down in the vast land.(也許是飄浮在無垠的空中，也許是深埋在廣袤的土地里。)

I love my job but somewhere deep down I was not made for it.(我熱愛我的工作，但在內心深處，我并非為此而生。)

Deep down I still loved him.(我在內心深處仍然愛著他。)