The condition of an exchangeforce has nothing to do with isospin.
交换力的条件与同位旋完全无关。
2
The influence of the traffic air exchangeforce on ventilation in tunnels is not negligible.
交通换气力对隧道通风的影响是不容忽视的。
3
PetroChina's stunning debut on the Shanghai stock Exchange again demonstrated the force of China's bull market, which has more than doubled its benchmark stock index so far this year.