Sanitation is the public work of keeping a town healthy by taking away human waste, dirty water, and rubbish, and treating them so they do not spread disease. It is bigger than washing your hands — that is personal hygiene.

Sanitation環境衛生 is the public work of keeping a town healthy指的是讓一個城鎮保持健康的公共工作 by taking away human waste, dirty water, and rubbish做法是清除人類排泄物、汙水和垃圾, and treating them so they do not spread disease並加以處理，讓它們不會傳播疾病。It它 is bigger than washing your hands範圍比洗手大——that is personal hygiene那是個人衛生。

Engineers talk about sanitation systems: toilets, sewers, treatment plants. In news about poor places you will often see clean water and sanitation as a pair.

Engineers工程師 talk about sanitation systems會談到環境衛生系統：toilets, sewers, treatment plants廁所、下水道、處理廠。In news報導裡 about poor places講到貧窮地區時 you你 will often see常常會看到 clean water and sanitation as a pair「乾淨的水和環境衛生」這兩個字一起出現。

Though actually, people stretch it: a city's sanitation department may also collect household trash, not only sewage, and some speakers use it loosely for any public cleanliness.

Though actually不過事實上，people人們 stretch it把這個字延伸使用: a city's sanitation department一個城市的環境衛生部門 may also collect household trash可能也會收一般家庭垃圾, not only sewage不只是處理汙水, and some speakers而且有些人 use it loosely for any public cleanliness會鬆散地用它泛指任何公共清潔。

From sanitary plus the ending -ation. It has nothing to do with being sane.

From sanitary plus the ending -ation它是由 sanitary 加上字尾 -ation 組成的。It它 has nothing to do with跟……一點關係也沒有 being sane「神智清楚」。