ideal working substance

例句：

1. 1. This is the ideal time for a vacation.
   这是度假的理想时间。
2. 2. The ideal solution to this problem is to find a new one.
   解决这个问题的最佳方法是找到一个新的。
3. 3. The ideal candidate for this job should have experience in the field.
   这个职位的理想候选人应该具有该领域的经验。