He lifted the rifle and carefully drew a bead on the target.他举起步枪仔细地瞄准目标。

The government is drawing a bead on inflation. [=is targeting inflation]政府正着眼于抑制通货膨胀。

It's hard to get a bead on [=to understand] the reasons for her decision.很难理解她为何做这个决定。