如果准备一次性添加或重写多个方法，清单13展示了如何以块的方式定义新方法？
If you are going to be adding or overriding several methods at once, Listing 13 shows you how to define the new methods in bulk.
由于一次性手套有许多用途，他们在准备出售前必须经过严格的检查。
Given the many USES for disposable gloves, they must undergo rigorous inspection before they are ready for sale.
服务用具准备到位，如火柴、一次性手套等。
Put the service equipment in place, such as matches, disposable gloves.
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