The client ended the partnership, citing the supplier's inconstancy in honoring its delivery promises.

客戶以供應商在履行交貨承諾上反覆無常為由，終止了合作關係。

Investors grew wary of the CEO's inconstancy after he reversed his merger pledge twice.

執行長兩度推翻合併承諾後，投資人對他的反覆無常越來越提防。

Her inconstancy toward the team surprised everyone when she quietly joined a rival firm.

她悄悄跳槽到競爭對手公司，對團隊的不忠令所有人震驚。