【学个词 deleterious】deleterious - adj.有害的，有毒的，有害于，危害性;

　　Definition: adjective - harmful often in a subtle or unexpected way

　　deleterious effects；deleterious to health；

Synonyms-　　adverse,bad,baleful,baneful,damaging，dangerous，detrimental，evil，harmful，hurtful，ill，injurious，mischievous，nocuous，noxious，pernicious，prejudicial，wicked

　　Choose the Right Synonym for deleterious

　　PERNICIOUS, BANEFUL, NOXIOUS, DELETERIOUS, DETRIMENTAL mean exceedingly harmful.

　　PERNICIOUS implies irreparable harm done through evil or insidious corrupting or undermining.

　　the claim that pornography has a pernicious effect on society

　　BANEFUL implies injury through poisoning or destroying.

　　the baneful notion that discipline destroys creativity

　　NOXIOUS applies to what is both offensive and injurious to the health of a body or mind.

　　noxious chemical fumes

　　DELETERIOUS applies to what has an often unsuspected harmful effect.

　　a diet found to have deleterious effects

　　DETRIMENTAL implies obvious harmfulness to something specified.

　　the detrimental effects of excessive drinking

　　Example Sentences

　　1 In developing countries, the imposition of boundaries around national parks and protected areas has been deleterious for both people and wildlife.

　　—Kristin B. Gunther, Association of American Geographers, 2002

　　2 Most everyone now knows the action of pressing mouse keys is far more deleterious to the tender structures of the wrist and hand than typing is.

　　—Michael Finley, Albany (New York) Times-Union, 2 Sept. 1998

　　3 This skewed allocation of resources away from those most in need, in turn, insures that many young people from low-income families will continue to be shut out of the economy, with obvious deleterious family and social consequences.

　　—Iris C. Rotberg, Education Week, 9 Mar. 1994

　　4 For as James Keirans pointed out to me, ticks are the world's most notorious carriers of the agents of diseases that strike animals, wild and domestic. And they rank second only to mosquitoes in their deleterious effect on humans.

　　—Edwards Park, Smithsonian, January 1987

　　5 The finance chief, more than any other executive, looks directly at the numbers that lay bare the pinch of inflation or the deleterious effects of an economic slowdown.

　　—Nina Trentmann, WSJ, 27 Nov. 2022

　　6 Indeed, the deleterious effects of drought have been compounded by chronic insecurity, including Al Shabaab destroying water sources and crops.

　　—Scott Peterson, The Christian Science Monitor, 21 Nov. 2022

　　7 The deleterious impact of our polarized environment has also spurred battles among the states.

　　—Wendy E. Parmet, Scientific American, 19 Oct. 2022