滑雪者在选择购买保险的问题上应该尤其慎重。Skiers should be particularly choosy about the insurance policy they buy.经过慎重考虑，我决定结束我的婚姻。After much thought I decided to end my marriage.但要慎重：这个选择代价不菲。But be warned: this is not a cheap option....
N - acylhomoserine lactone ( AHL ), as quorum sensing signals, regulate expression of virulence factors of many plant pathogens.N - 酰基高丝氨酸内酯 ( N-acylhomoserine lactone, AHLs ) 作为细菌群体感应中的信号分子参与调节植物病原细菌致病因子的表达.Applic [ a t...