on the edge of和on the verge of的区别

on the edge of 在……的边缘(表示位置) /“即将,濒于”
He sat down on the edge of the kang.
他在炕边坐下
He sat on the edge of the table .
他坐在桌子边上.
The company is tottering on the edge of bankruptcy.
该公司濒临破产.
on the verge of 接近于,濒临 /将要；有可能 (表示情况,形势,处境)
Some animals are on the verge of extinction.
有些动物已濒临绝种.
She was on the verge of bursting into tears.
她快要哭出来了.
作“即将,濒于”讲时,两者可以换用,如:
The company is tottering on the edge of bankruptcy.
=The company is tottering on the verge of bankruptcy.