Step-child
[医]夫和前妻所生子女（妻和前夫所生子女）
🧩 词语组成解析
step
[stɛp]
n. 步，脚步;步骤，手段;步调;级别;
vt.& vi. 举步，行走;踩，踏上;跨入;轻快地走;
vi. 踏，踩;走;
vt. 跳舞;迈步;使成阶梯状;
child
[tʃaɪld]
n. 小孩，孩子;幼稚的人;产物;弟子;
🗣️ 情景例句
Yes, but Dr. Lee's schedule is full for today. How about 9:00 tonight?
可以，不过李医生今天的时间排满了。今晚9点好吗？
OPPS!
哇！
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，