◎ 临时 línshí[at the time when sth.happens] 事到临头◎ 临时 línshí[temporary; casual; contingent; impromptu; provisional; tentative; temporary; occasional; for the time being] 非正式的;短期的、暂时的 临时总统这本参考书临时借用一下临时办法-----------------国语辞典:正当其时。如:「约好的,她临时又变卦了。」短时间的、暂时的。如:「临时雇员」。近暂时反固定,经常,永久
◎ 了如指掌 liǎorúzhǐzhǎng[have sth.at one’s fingertips; know as one know his ten fingers; know like a book; know as well as a beggar knows his bag] 形容对情况极为清楚 对他们的活动,他完全了如指掌-----------------国语辞典:本指天下事如掌中物,易于了解。语本《论语.八佾》:「『知其说者之于天下也,其如示诸斯乎?』指其掌。」后比喻对事情了解得非常清楚。《荡寇志.第三三回》:「虽未出兵打仗,而战阵攻取之法,了如指掌。」也作「了如指掌」、「了若指掌」、「了若指掌」。英语 to know sth like the back of one's hand (idiom), to know (a person, a place etc) inside out德语 etwas kennen wie seine Hosentasche (Sprichw), etwas kennen wie seine Westentasche (Sprichw), wörtl. etwas so gut kennen wie seine eigene Hand (Sprichw)