| 单词 | pre-emergent | 
| 释义 | > as lemmaspre-emergent   pre-emergent adj.  Brit. , U.S. , ΘΚΠ the world > food and drink > farming > cultivation or tillage > cultivation of plants or crops > 			[adjective]		 > other systems of growing crops sharecrop1871 two-field1907 sharecropped1933 pre-emergence1939 pre-emergent1942 monocrop1953 1942    Ecol. Monogr. 12 210/1  				The failure of this percentage of the viable seed to emerge is attributed to preemergent damping-off, variable sowing depth, and perhaps..to insects. 1986    G. Keillor Lake Wobegon Days 93  				Bud has considered using a pre-emergent herbicide. < as lemmas | 
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