Sterosome
坚硬体
🗣️ 情景例句
She is busy now.
她正忙着呢。
A good horse often needs a good spur.
好马常要好靴刺。
By 1820 the population of New York had grown to about 125,000, making it the largest city in the USA.
到1820年，纽约市的人口增长到12。5万人左右，使它成了当时美国最大的城市。