negate基本解释
vt,否定；取消；使无效,同近
Efforts to expand the tourist industry could be negated by reports that the sea is highly polluted..有关海洋受到严重污染的报道可能会使拓展旅游业的努力完全白费。
否定；取消；使无效英释中释vto prevent something from having any effect
