1. The required minimum horizontal dimension of a pool for Group I cetaceans shall be 7.32 meters (24.0 feet) or two times the average adult length of the longest species of Group I cetacean housed therein (as measured in a parallel or horizontal line, from the tip of its upper jaw, or from the most anterior portion of the head in bulbous headed animals, to the notch in the tail fluke 8), whichever is greater; except that such MHD measurement may be reduced from the greater number by up to 20 percent if the amount of the reduction is added to the MHD at the 90-degree angle and if the minimum volume and surface area requirements are met based on an MHD of 7.32 meters (24.0 feet) or two times the average adult length of the longest species of Group I cetacean housed therein, whichever is greater.
1组别1的鲸豚饲育池之最小水平长度需求应为7.32公尺(24.0脚)或者计算组别1最长体型类的鲸豚平均成鲸之长度的两倍数据(以水平线方式测量，从它的上颚尖，或者从圆型额头之动物的额头最前端的部分一直量到尾巴分岔口)，其最大数值；这样的MHD 测量方式可能会被最大值减损约20%的量，如果损耗值以90 度角增加至MHD而且如果最小量和需求之表面面积符合MHD标准 7.32公尺(24.0英尺)或者组别1最长体型类的鲸豚平均成鲸之长度的两倍数据，其最大的值。
by a fluke
2. By a fluke I had hit the mark!
我歪打正着！
3. She had only spent twenty minutes writing her essay, she won the writing contest by a fluke.
她写作文仅仅用了20分钟，她在这次作文竞赛中取胜纯属侥幸。
4. The police have stumbled on this man by a fluke.
警方是碰巧撞上了这个人的。
5. We are here by a fluke and are going to end up as no more than dust and ashes.
我们在这里只是个意外，我们只能像尘土一样完结。
1. by a fluke
1. Nuggets coach George Karl knew his team had been beaten by a fluke.