推敲: to think over...
交付: to hand over, to deliver...
外籍: foreign (i.e. of foreign nationality)...
脑子: brains, mind...
不亦乐乎: isn't that a joy (quote from Confucius), (jocularly) extremely, awfully...
作用: to act on, to affect, action, function, activity, impact, result, effect, purpose, intent, (suffix) -ation, -tion etc, as in, inhibition...
棍棒: club, staff, stick...
盛气凌人: overbearing, arrogant bully...
课本: textbook...
内科: internal medicine, general medicine...
