To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.

　　需要持有明確的空中交通管制許可才能進入B類空域，如接近一個大都會機場。

　　Explicit corporate values, for example, produced a greater percentage of decisions that were stressful due to value contention.

　　例如，明確的企業(yè)價值觀會導致更大比例的決策因價值爭奪而產(chǎn)生壓力。

　　In addition, parents and teachers can help children by providing explicit instruction regarding the mind as a learning machine.

　　此外，家長和老師可以通過提供明確的指導來幫助孩子，將心智作為一個學習機器。

　　No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight.

　　盡管飛行員必須繼續(xù)遵守有關視覺飛行規(guī)則的所有規(guī)定，但無需獲得空中交通管制的明確進入許可。