wèi le / yù fáng / bō zhuàng rè / mù chǎng / gōng rén / yīng / bì miǎn / yǐn yòng / wèi jīng / bā shì / xiāo dú / de / niú nǎi为了预防波状热,牧场工人应避免饮用未经巴氏消毒的牛奶。To prevent brucellosis, farm workers should avoid drinking unpasteurized milk.