...In many instances identity of the predatorcould not be determined, but it is believed that such attacks by theopossum were relatively infrequent and inefficient... 
Henry S. Fitch 「Ecology of the Opossum on a Natural Area in Northeastern Kansas」
...But the latter were divided in theircounsels, and the aid they gave the Olynthians was inefficient...
Marcius Willson 「Mosaics of Grecian History」
...Such artificial lightsas men then had would now be deemed very inefficient...
E. Walter Maunder 「The Astronomy of the Bible」
...Presuming on the late inefficient harvest, the settlers requested again to be supplied with seed wheat from the store, but were refused...
David Collins 「An Account of the English Colony in New South Wales, Vol. 2」
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