Solurutine
嗎乙蘆丁
??? 情景例句
before getting to the tough stuff--math.
在對付難纏的東西 數學 之前。
It is never too late to mend.
亡羊補牢，猶為未晚。
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算別人為我們為所提供的服務的價值卻是極其困難的。