Definition: about or relating to Level: C1
说到即将召开的会议，我们应该敲定议程。
Speaking ___of the upcoming conference, we should finalise the agenda.
让我们讨论新立法的影响。
Let us discuss the implications ___of the new legislation.
她对所涉及的科学原理了解甚少。
She has scant understanding ___of the scientific principles involved.
