Transpolyisoprene
反式聚甲基丁二烯
🗣️ 情景例句
how could I live in Los Angeles
我怎么能住在Los Angeles
Kind words are worth much and cost little.
口头方便不费力。
It was Sunday.I never get up early on Sundays.
那是个星期天，而在星期天我是从来不早起的，