侵蚀过深过浅均可导致病理妊娠的发生。
Too deep or too shallow invasion may lead to a pathologic pregnancy.
他们不得不侧着身子往前走，有时过浅溪，有时游过深潭。
They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools.
而那些过浅和充满岩石的海域，恰恰是海獭数量保持稳定的地区。
And shallow and rocky locations are precisely the types of locations where sea otter populations have not declined.
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