Bipropargyl
联丙炔
🗣️ 情景例句
Can you show me how to apply this make-up correctly?
你能告诉我怎么正确地使用这种化妆品吗？
Mr. Li is not afraid of working hard.
李先生不怕吃苦。
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。