Matched context for useful and ineffective

The page lists matched contexts for useful and ineffective.

Share - useful	Share - ineffective	Phrase
0.63%	15.71%	{useful or ineffective} [effectiveness] fuel
1.15%	3.25%	{useful or ineffective} [effectiveness] system
0.79%	2.32%	{useful or ineffective} [effectiveness] catalyst
1.58%	0.92%	{useful or ineffective} [effectiveness] it
0.27%	5.46%	{useful or ineffective} [effectiveness] means
0.60%	1.02%	{useful or ineffective} [effectiveness] device
0.18%	3.82%	{useful or ineffective} [effectiveness] stroke
0.32%	1.06%	{useful or ineffective} [effectiveness] valve