Polycaprolactam
聚已内酰胺, 尼龙-6
🗣️ 情景例句
one of the best tennis players on the Michigan team--
当年Michigan球队最好的网球选手--
Don't forget to put stamps on the letter.
不要忘记在信封上贴邮票。
it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth.
在月球上加速到每秒1。5英里比在地球上所用能源要少得多。