處在(災難或危險)的邊緣;瀕臨
teeter on the brink / edge of sth
to be very close to a very unpleasant or dangerous situation
The country is teetering on the brink of civil war.這個國家正處在內戰的邊緣。
釋義來自《牛津高階英漢雙解詞典》第 9 版