natural gas 奇怪了 第一次搜就不出结果 频率过低 第二次搜就可以了

 

 

1			,	4690
2			AND	3520
3			THE	3375
4			.	3369
5			OF	2779
6			TO	2010
7			IN	1545
8			OIL	1467
9			A	1212
10			IS	1066
11			FOR	990
12			THAT	789
13			FROM	716
14			AS	593
15			COAL	571
16			PRICES	549
17			ON	522
18			OR	486
19			'S	458
20			WITH	440
21			''	427
22			ARE	418
23			(	410
24			)	401
25			BY	390
26			IT	375
27			PRODUCTION	330
28			HAS	326
29			HAVE	301
30			BE	299
31			MORE	275
32			PRICE	263
33			LIQUEFIED	256
34			ELECTRICITY	250
35			WE	247
36			WHICH	246
37			USE	245
38			WILL	237
39			AT	233
40			FUEL	233
41			INDUSTRY	224
42			POWER	220
43			RESERVES	220
44			BUT	217
45			THAN	210
46			PIPELINE	204
47			ITS	196
48			ENERGY	193
49			AN	190
50			CAN	189
51			:	184
52			WAS	179
53			PLANTS	172
54			DRILLING	168
55			WOULD	168
56			U.S.	165
57			NOT	161
58			ALSO	158
59			SUPPLY	158
60			ABOUT	153
61			THIS	151
62			NEW	149
63			INTO	138
64			COMPRESSED	135
65			LIQUIDS	134
66			OUR	133
67			UP	130
68			OTHER	128
69			COULD	124
70			PERCENT	124
71			?	123
72			COMPANY	120
73			MARKET	118
74			CHEAP	117
75			BEEN	116
76			CUBIC	116
77			IF	116
78			BECAUSE	115
79			ALL	114
80			YOU	114
81			LIKE	113
82			SHALE	110
83			PIPELINES	109
84			RESOURCES	109
85			NUCLEAR	108
86			PLANT	108
87			THEY	108
88			WERE	108
89			FEET	104
90			-	103
91			MUCH	103
92			USING	103
93			WELL	103
94			CRUDE	101
95			COMPANIES	100
96			LOW	100
97			SO	100
98			SUPPLIES	100
99			WHEN	100
100			LARGEST	98
			TOTAL	45641