TEM results show that when a second metal is added on the BN support, a second kind of particle can be seen, this could be a bi-metal cluster or alloy formation.是什么意思_TEM results show that when a second metal is added on the BN support, a second kind of particle can be seen, this could be a bi-metal cluster or alloy formation.在线翻译_英语_读音_用法_例句