A watch dog
看家狗,看門狗
?? 詞語組成解析
watch
[w?t?]
vt. 注視，注意;看守，監(jiān)視;守候（機會等）;密切注意;
n. 表;值夜，值班;看守，監(jiān)視;值班人員;
vi. 觀看;注視;守候;看守;
dog
[d?ɡ]
n. 狗;蹩腳貨;丑女人;卑鄙小人;
v. 困擾;跟蹤;
??? 情景例句
I think I've seen you before, You look very familiar.
我想我以前在哪里見過你，你看起來非常面熟。
He should have a long spoon that sups with the devil.
跟壞人打交道，要特別小心。
He is commonly supposed to be foolish.
他是公認的傻瓜。