Pneumoserosa
關(guān)節(jié)腔充氣法
??? 情景例句
It probably means we can't stay.
看來(lái)我們不能待在這兒了。
I wasn't aware of that.
我沒(méi)有意識(shí)到。
It is hard for us to realize nowadays how difficult it was for the pioneers.
我們今天很難想像昔日的登山先驅(qū)們是多么艱苦。