Psilopsida
松叶蕨纲
🗣️ 情景例句
If you educate the public about dangerous diseases they can protect themselves, which will help to halt the spread.
如果你能教育公众如何来防治危险疾病，他们就能够保护好他们自己，从而阻止疾病的传播。
Will you please measure this window to see how wide it is?
请您测量这扇窗户看它有多宽？
When are you going to have a holiday, Sam?
萨姆，你准备什么时候去度假？