定数
constant (math.); quota; fixed number (e.g. of places on a bus); fixed quantity (e.g. load of truck); destiny
订书机
stapler; stapling machine; bookbinding machine; CL:臺|台[tai2]
钉书针
staple; also written 訂書針|订书针[ding4 shu1 zhen1]
棕顶树莺
(bird species of China) grey-sided bush warbler (Cettia brunnifrons)