解釋：
definitely 英[?def?n?tli] 美[?def?n?tli]
adv. 明確地; 確切地; 壹定地; 肯定地;
int. （表強烈的肯定） 當然;
[例句]I'm definitely going to get in touch with these people
我肯定會跟這些人取得聯系。
let down 英[let daun] 美[l?t da?n]
[詞典] 放下; 放低; 使失望; 失信;
[例句]But then to be let down like that, oh it's so unfair!
但是接下來竟讓人如此失望，唉，這真不公平！