1 sentence for 淡 (dàn — nitrogen)

1. 在一些旧的文献里，氮元素常被写作淡。

   zài yī​xiē jiù de wén​xiàn lǐ, dàn yuán​sù cháng bèi xiě​zuò dàn.

   In some old literature, the element nitrogen was often written as the character '淡'.

   Source: Dong Chinese Dictionary