Ecf
abbr. electrochemical fluorination-process 电化氟化法; extracellular fluid 细胞外液
🗣️ 情景例句
Have a go at it.
你来试一试。
Did you see the special last night?
昨晚你看特别节目了吗？
Education, with its cycles of instruction so carefully worked out,
教育，以其教学周期如此精心地安排，