激素替代治疗非常重要，应该及早开始。Hormone replacement therapy is very important and should be instituted early.激素植入物被用作生长辅助剂.Hormone implants are used as growth boosters.分泌的激素进入到血液中.Hormones are secreted into the bloodstream....
坦克停了下来，长长的炮管转过来瞄准了山脊。The tank stopped with the long snout of its gun turned to the ridge.火焰温度较低, 因而可使炮管寿命较长.The flame temperature is lower, thus giving a longer barrel life.二战时期的重型火炮的炮管,也是这么工作的.The heavy gun barrels of W...