at one's mother's (或 father's) knee

at an early age

兒時(shí)

bend (或 bow) the (或 one's) knee (to)

kneel in submission; submit

下跪，屈服

bring someone/thing to their/its knees

reduce someone or something to a state of weakness or submission

迫使某人（或物）屈從

fall (或 drop，或 sink，等) to one's knees

assume a kneeling position

下跪，跪下

on bended knee(s)

kneeling, especially in entreaty or worship

（尤指乞求或崇拜時(shí)）跪著

did your guy propose on bended knee?.

你男朋友是不是跪著求婚的？。

on one's knees

in a kneeling position

跪著

weak at the knees

overcome by a strong feeling, typically desire

被（強(qiáng)烈感情，尤指欲望）屈服