Sper
abbr. solid-phase epitaxial regrowth 固相外延再生长; Syndicat des Industries de Materiel Professionel Electronique et Radioelectrique （法语）电子, 无线电器材工业公司
🗣️ 情景例句
I'm retired.
我退休了。
Have you ever thought about becoming a professional musician?
你曾经考虑了成为一个职业的音乐家吗？
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，