The lack of middle-class income growth during that span is "the defining issue of our time," Mr. Summers has said, in a tacit admission that liberals were ahead of him on this issue.
萨默斯表示，在这段时期，中产阶级收入增长的缺失是“我们这个时代最重要的议题，”这事实上是承认，自由派在这个议题上要更胜他一筹。
To extend the frame and create an adjustable platform, Teal designed a long span in the middle of the bike that was light and rigid.
为了扩展车架并打造一个可调节平台，蒂尔在自行车中间设计了一个既轻且硬的长轴。
You might want to include the Google search control in a span element, right in the middle of the rest of your app's content, rather than off to the side in a div.
还可以将Google搜索控件包括在一个span元素中，放在其余的应用程序内容的中间，而不是放在侧面的一个div中。
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