Haloport f
一种聚四氟乙烯载体
🗣️ 情景例句
Yeah.
是的。
All things are difficult before they are easy.
凡事必先难后易。
You see, we've been in China for over two years now, so we are travelling back to England soon for a holiday.
您知道，我们到中国已有两年多时间了，所以不久后我们就要回英国度假了。