Tetrahydroalstonine
四氫鴨腳木堿
??? 情景例句
in a horse and carriage.
坐馬車。
I know the boy whose father is a scentist.
我知道那個男孩的父親是科學家。
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
這些衛星繞著地球轉，幫助我們更好地了解地球、天氣和其他情況。