?? 詞語組成解析
sir
[s?]
n. 先生;（用于姓名前）爵士;（中小學生對男教師的稱呼）先生;老師;
jack
[[d??k]]
n. 插座, 千斤頂, 男人\\nvt. 抬起, 提醒, 扛舉, 增加, 提高, 放棄\\na. 雄的\\n[計] 插座
n. 霍布斯（人名）
??? 情景例句
It's completely beyond my grasp.
我完全摸不著頭腦。
It's up in the air.
尚未確定。
In a short time I was busy mixing butter and flour and my hands were soon covered with sticky pastry.
不一會兒我就忙著調拌起了黃油和面粉，很快我的手上就沾滿了粘粘的面糊。