Collinite
凝胶煤素质; 无结构腐殖体
🗣️ 情景例句
sleep over Friday and Saturday night
星期五和星期六晚上在那儿过夜
I ought to see the manager.
我应该见经理。
Many of the tourists on board had begun bargaining with the tradesmen, but I decide not to buy anything until I had disembarked.
船上许多游客开始同商贩讨价还价起来，但我打定主意上岸之前什么也不买。