The birch used for coffins overtops that used for violins.

将被制成棺木的桦树，高于被制成提琴的桦树。

The birch seen from the dead overtops that from the living.

死人眼中的桦树，高于生者眼中的桦树。

And if the river rises so much that the water overtops the levee, then both sides should flood pretty equally.

如果河水涨得太高，高到漫过了堤坝，那么河道两岸受洪水侵袭的程度也应该是差不多的。