corner stone

名词 corner stone:

1. the fundamental assumptions from which something is begun or developed or calculated or explained
   同义词：basis, base, foundation, fundament, groundwork, cornerstone
2. a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies
   同义词：cornerstone
3. a stone at the outer corner of two intersecting masonry walls
   同义词：cornerstone

1. The root of the big tree trends to edge away the corner stone.
   这棵大树的根可能会把墙角石顶走。