You have one rule invoking another rule and then you can get a sentence like "Fred thinks Barney likes Wilma".

遵循调用另一个规则的这个规则，然后你就得到了像“弗雷德觉得巴尼喜欢威尔玛”这样的句子。

These rings are indicative of the crystal structure of nickel and can be explained only by invoking wavelike properties of light.

这些光圈表明了了镍的晶体结构，而且只能通过光线中波的特征来解释。

The spike might have helped in extracting meat from snails, a popular Roman food, and the spatula invoking sauce out of narrow-necked bottles.

长钉可以用来挑出蜗牛肉，这是一种流行的罗马食物，而抹刀可以从窄颈瓶中提取调味酱。

Code for invoking MQ functions.

调用mq函数的代码。

Manually invoking relationships.

手动调用关系。