Monday，2025.05.12
New words：
artificial [ˌɑrtɪˈfɪʃl] adj.人工的；人造的；
Sample Sentences：
The first artificial heart was created in Russia in 1936.
The new dam will form a large artificial lake behind it.
85 percent of artificial Christmas trees are made in China.
dam [dæm] n.水坝；拦河坝