With the deepening of two-way exchanges among enterprises of the two countries, the investment is expanding.

随着企业双向交流的不断深入，两国投资规模日益扩大。

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In the middle-late stages of production, as the deepening of the oil field development, the marginal operation output decrease, the cost increases, and the investment increase, too.

在油田开采中后期，随着油田开发程度的加深，措施作业边际产量递减，措施作业边际费用递增，措施作业增量边际成本递增。

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So deepening trade and investment between us is crucial and can really help to stimulate growth.

WHITEHOUSE: President Obama and Prime Minister Cameron Hold a Press Conference | The White House

Second, our joint vision commits us to deepening our trade and investment.

WHITEHOUSE: President Obama holds a Press Conference with Prime Minister Noda of Japan | The White House

As the United States pursues a new trade and investment partnership with the EU, I want to make sure that we also keep deepening our economic ties with Turkey.

WHITEHOUSE: President Obama Holds a Press Conference with Prime Minister Erdogan | The White House