boron
noun [ U ] uk/ˈbɔː.rɒn/ us/ˈbɔːr.ɑːn/ (symbol B)
硼（一种非金属化学元素，质硬，黄褐色，用于核反应堆中以吸收中子;其化合物在制造业中非常重要）
a hard, yellow-brown chemical element used in nuclear reactors to absorb neutrons and in various compounds that are important in manufacturing