To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。
Explicit corporate values, for example, produced a greater percentage of decisions that were stressful due to value contention.
例如，明确的企业价值观会导致更大比例的决策因价值争夺而产生压力。
In addition, parents and teachers can help children by providing explicit instruction regarding the mind as a learning machine.
此外，家长和老师可以通过提供明确的指导来帮助孩子，将心智作为一个学习机器。
No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight.
尽管飞行员必须继续遵守有关视觉飞行规则的所有规定，但无需获得空中交通管制的明确进入许可。