制订

zhìdìng

to work out

流域

liúyù

river valley

农事

nóngshì

agricultural affairs

转折点

zhuǎnzhédiǎn

turning-point

历法

lìfǎ

calendar

降水

jiàngshuǐ

rainfall

地域

dìyù

territory

清爽

qīngshuǎng

fresh, brisk