 美 
											[ˌvɑːlən'terəli]
										
													美 
											[ˌvɑːlən'terəli]
																 
										
							
																																	"he voluntarily submitted to the fingerprinting"
																															
His lectures were so popular that we would turn up voluntarily to attend them.
出自: A. Kenny
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海词词典,十七年品牌