每次我感冒都会流鼻血。Whenever I have a cold I get a nosebleed.感冒是上呼吸道的感染。A cold is an infection of the upper respiratory tract.她的鼻孔略带粉红，好像患了感冒似的。Her nostrils were pinkish, as though she had a cold....
The synthesis methods of magnesia - alumina spinel are electro - fusion and sintering process.镁铝尖晶石的合成方法有电熔法和烧结法.Township enterprises have a paper, agricultural machinery bearings, magnesia and other plants.乡镇企业有造纸 、 农机轴...