akene

例句：

1. 1. The aqueous phase is the part of the solution that contains water.
   水相是溶液中包含水的那部分。
2. 2. The acetone phase separates from the other phases and becomes visible.
   丙酮相从其他相中分离出来并变得可见。
3. 3. The alkane phase is the hydrocarbon component of the mixture.
   烷烃相是混合物中的烃组分。