美 
											[dɪ'saɪsɪv]
																
										
							very important for the final result of a particular situation
able to decide sth quickly and with confidence
																																	"cast the decisive vote"
																							"two factors had a decisive influence"
																															
																																	"had a decisive lead in the polls"
																															
																																	"an able and decisive young woman"
																							"we needed decisive leadership"
																							"she gave him a decisive answer"
																															
																																	"a critical point in the campaign"
																							"the critical test"
																															
The decisive argument his friends had used to convince him.
出自: A. Koestler
Midway..one of the decisive battles of the war.
出自: D. Fraser