机器配有优力胶修正装置，可对优力胶反复多次修整后使用。

There is a rubber repair device with the machine, the rubber can be used after be repaired.

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保龄球在过去的10年间有了巨大的进步，1990年以前，球的材质仅限于优力胶、玻利及橡胶。

Bowling balls have advanced immensely over the past decade alone. Before the 1990's, the only types of bowling balls available were urethane, plastic, and rubber.

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相反的是，太平洋战场上的日军面对美军占绝对优势的火炮和空优，利用挖掘链式深坑极大地强化了许多岛屿的防御力。

By contrast, the Japanese in the Pacific theatre, faced with overwhelming American artillery and airpower, heavily fortified many of their islands with chains of deeply dug caves and bunkers.

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