Some solutions are more complex and include multiple line items (work items), while others involve only one item.
有些解决方案非常复杂并包含多个条目(工作项)，然而有些却仅仅包含一个条目。
He says APEC is a good forum to reach limited agreements that involve only some of the member nations.
他说APEC是一个很好的论坛，APEC是推动这类协议的好机会。
Some of these estimates involve only univariate numerical integrals.
某些估计只涉及到一重数值积分。
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