Diaminoditolyl
二甲基二氨基联苯
🗣️ 情景例句
and just enjoy this beautiful spring day.
尽情享受这美好的春天。
Early to bed and early to rise,makes a man healthy,wealthy and wise.
早睡早起，使人健康、富有而聪明。
The growth of alternative mental interests is a long process.
精神上多种情趣的培养是一个长期的过程。