[dā ying]
（应声回答） answer; reply; respond
I knocked at the door several times, but there was no answer.
我敲了几下门， 但没人答应。
He promised to do his best.
他答应尽力而为。
They promised an immediate reply.
他们答应立即回复。
consent to her request
答应她的请求
He agreed to help me.
他答应帮我忙。