...More than that, on trying the penetrative effect of mybullets, I found that they would smash through a steel plate an eighthof an inch thick at thirty yards' range... 
J. H. Patterson 「The Man-eaters of Tsavo and Other East African Adventures」
...Children arelike birds of a social and loquacious disposition intheir fondness for a set call, a penetrative cry or note,by means of which they can converse at long distances...
W. H. Hudson 「Birds and Man」
...’ The Great Cluster in Perseus, which liesin the Milky Way, also baffled the penetrative capacity of Herschel’sinstruments...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
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corpuscles buttercup conn
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