The present invention relates to large-scale equipment for producing foamed plastic, and especially to a double-purpose mold frame used for producing foamed plastic.

本发明涉及生产泡沫塑料的大型设备，特别涉及一种用于生产泡沫塑料的双效模具模框。

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The invention relates to a double-purpose book end used on desks by students, which not only can erect books but also can be utilized as a stable support for the design of a low-voltage reading lamp.

本发明涉及一种学生用在课桌上既能竖立书本又能利用书立稳定的支架设计一低压台灯的两用书立。

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Certainly, all three operators-the single, double, and back quotation marks-serve a valid purpose, but like exceptions in English, memorizing and mastering the variations can be maddening.

当然，这三种操作符(单引号、双引号和反撇号)都有合法的用途，但是与英语中的例外一样，记住和掌握这些细微差异很令人头疼。

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And a great antidote to deflation is current income: so investing in real assets that also provide yield is a double-purpose move.

FORBES: Inflation Hedges That Pay Today

However, advances have been made in the use of green addressing techniques that solve the confirmation delay problem by utilizing special-purpose bitcoin addresses from parties trusted not to double spend.

FORBES: Bitcoin Obliterates 'The State Theory Of Money'