Pbf
[医][=peripheral blood flow]外周血流（量），末梢血流量
🗣️ 情景例句
Remember my apple pie on Thanksgiving?
记得在感恩节我做的苹果派吗？
No rose without a thorn.
玫瑰都有刺。
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，