So high as heaved the tumid hills, so low Down sunk a hollow bottom broad and deep, Capacious bed of waters.

高耸的山峰升得这高，低洼的湖底沉得这低，阔而广，好河床——。

youdao

They looked and saw a little hollow in the grass, with a grassy bottom, warm and dry.

他们看见草中有个小坑，坑底长满温暖而干燥的草。

youdao

The valve at the bottom of auger can prevent drilling bits entering hollow pipe during operation. When drilling pipe is taken out and concrete grout is injected, the valve will be opened.

螺旋钻头底部阀门防止钻进过程中钻屑进入到空心的混凝土管中，当钻杆提出同时混凝土浆注入时，钻杆底部的阀门将被打开。

youdao

Make a cut on the top of the bread from point to point, and bake for 30-35 minutes or until the bread is nicely browned and there is a hollow sound when the loaf is tapped on the bottom.

NPR: U.S. Team Readies for World Baking Championship