to be daydreaming or not paying attention to reality
做白日梦或不关注现实 (zuo baidimeng huo bu guanzhu xianshi)
"He was having his head in the clouds during the lecture."
"他在讲座期间头脑云端。" (Ta zai jiangzuo qijian tou nao yun duan)
to start a new hobby or leisure activity
to study intensely
to refuse to answer a question on the grounds that it may in...
take a risk hoping for more success
To spend all your time studying
a complex problem that may cause more trouble once started
