1.The microneedles are either hollow or empty, like a normal hypodermic needle, or covered with a drug which breaks down in the eye.
break down 分解;發(fā)生故障;失敗;毀掉;制服;破除 (障礙、偏見(jiàn)等) [表贊許]
Over time, the protein in the eggshell breaks down into its constituent amino acids.
隨著時(shí)間的推移,蛋殼中的蛋白質(zhì)分解成其構(gòu)成成分氨基酸 。
Women's sports are breaking down the barriers in previously male-dominated domains.
女子體育運(yùn)動(dòng)正在打破障礙進(jìn)入一些先前由男子占主導(dǎo)地位的領(lǐng)域 。