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1·You can remove the line entirely or leave an empty set of square brackets.

可以完全移除整个行，或者只留下方括号空集。

2·Start from scratch: Start with an empty set of conditions and add your own.

从头开始：从一组空的条件开始并添加您自己的条件。

3·What we obtain is that searching with single word (single term) is an empty set.

我们得到的是单个词的搜索（单项）是空集。

4·Note that these 32 subsets include T itself and the empty set, which contains no elements at all.

应该注意到这32个子集中包含T本身和空集（空集即不含任何元素的集合）。

5·This occurs because the fields are empty, so we are actually multiplying nothing by nothing (or empty set by empty set).

之所以会出现这个问题是由于字段是空的，因此实际上进行的计算是零乘零（或者空集乘空集）。

6·When you invoke a Groovy method that has no parameters, you must call it with an empty set of parentheses, which allows Groovy to distinguish between a property access from a method call.

当您调用一个没有参数的Groovy方法时，您必须使用一对空括号调用它，这使得Groovy可以分清一个属性访问和一个方法调用之间的区别。

7·They set the empty vehicle to circle the building to avoid paying for parking.

他们让空的汽车在大楼周围兜了一圈，以避免付停车费。

8·They take their driver-less car to an appointment and set the empty vehicle to circle the building to avoid paying for parking.

他们把自己的无人驾驶汽车开到约定的地方，然后让空车绕行大楼，以避免支付停车费。

9·They take their driverless car to an appointment and set the empty vehicle to circle the building to avoid paying for parking.

他们把无人驾驶汽车开到一个约会地点，然后让空车围着大楼周围转，以避免支付停车费。

10·This process is known as index matching and produces a (possibly empty) set of eligible indexes for the given query.

该过程被称为 “索引匹配”，并且为给定的查询生成一组合适的索引（可能是空集）。