兵來將敵，水來土堰

counter soldiers with arms, water with an earth weir (idiom); different situations call for different action / to adopt measures appropriate to the actual situation

soldiers / a force / an army / weapons / arms / military / warlike / CL:個|个[ge4]

to come / to arrive / to come round / ever since / next

will / shall / to use / to take / to checkmate / just a short while ago / (introduces object of main verb, used in the same way as 把[ba3])

general / commander-in-chief (military) / king (chess piece) / to command / to lead

to desire / to invite / to request

(bound form) a general / (literary) to command; to lead / (Chinese chess) general (on the black side, equivalent to a king in Western chess)

enemy / to be a match for / to rival / to resist / to withstand

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes

Tu (ethnic group) / surname Tu

earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

weir