并行活动的英文

concurrent activities

parallel activity

• 并行:    parallel; pairing; ...
• 活动:    move about; exerci ...
• 飞行活动:    flight operations; ...

例句与用法

1. Learning the system , and designing and executing tests are now parallel activities
   认识系统，以及涉及和执行测试现在是并行活动。