“substantial portion”造句，怎麼用substantial portion造句

Another substantial portion of the debt consists of surpluses in the social security account.

BP is trying to install a dome over the leaking well with hopes of funneling a substantial portion of the oil onto a tanker above.

Is it not because they have imposed themselves on a substantial portion of the banking, financial, cultural and media sectors?

Within operations there exists a substantial portion of two key elements of successful business_profits through the control of costs, and cash flow through planning decisions and lead time control.