keep tabs (或 a tab) on

(informal)monitor the activities or development of; keep under observation

(非正式)監(jiān)控…的活動（或進展）；密切注意

pick up the tab

(informal, chiefly N.Amer.)pay for something

(非正式，主北美)付賬；承擔費用

my company will pick up the tab for all moving expenses.

我公司將承擔搬遷的所有費用。

keep tabs on【非正式用語】

To observe carefully

密切注意

Let's keep tabs on expenditures.

讓們密切注意開支情況