Yabla video uses of 中叶

世纪 shìjì
中叶 zhōngyè
In the middle of the 5th century,
zài
十九 shíjiǔ
世纪 shìjì
中叶 zhōngyè
Kǎi
hěn
duō
化学家 huàxuéjiā
一样 yīyàng
In the mid-nineteenth century, Kekule and many chemists alike