目标的两个特征是难度和明确性。

Two features of goal are difficulty and specificity.

但是很多人认为法律应该有更大的明确性。

But many think the law should give greater certainty.

稳态理论的优点之一是它的明确性。

One advantage of steady - state theory is its clarity.

民事法益具有不明确性、层级性的特点。

Civil legal interest is characterized with obscurity and gradation.