Research indicates the key skill for guaranteeing the successful rate and stability of forehand attack is to return a ball at it initial risingperiod or initial down period.
经研究发现，在来球上升初期和下降初期击球是保证攻球稳定性和成功率的关键技术。
2
There's no lag period, and notice that antibody levels start rising right away after the second exposure.
没有迟滞期，注意抗体水平在第二次接触后立即开始上升。
3
It is principally during this period of stronger governance that CEO pay has been high and rising.