Pilifer
唇基侧片
🗣️ 情景例句
Richard and I will put them into the envelopes.
我和Richard把它们放进信封。
They had excepted me to go with them.
他们原本希望我和他们一起去。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。