flexible group average 可变类平均
the Flexible Interval Average 柔性区间平均
flexible group average methods 可变类平均法
flexible average
灵活的平均
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The density, scalability, and portability of oil, gas, and coal make them affordable, reliable, and flexible for average consumers.
FORBES: Oil & Gas Isn't Just One Of The Richest Industries, It's Also One Of The Safest
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