We'd better get the requisites for a trip ready beforehand.我们要预先准备好旅行所必需的东西.These military devices , leading to victory, must not be divulged beforehand.此兵家之胜, 不可先传也.Just like Mark had told me beforehand, Shamir is ...
The oligochitosan and chitobiose, produced by degrading chitosan, have exhibited some particular physiological activities and function.摘要壳聚糖降解制备的低聚壳聚糖和壳寡糖具有许多独特的生理活性....