这是他的印度三部曲中的第一部。

This is the first in his ___trilogy about India.

《终结者》三部曲可能是最明显的例子之一，其中机器进化到我们无法控制，几乎灭绝了所有人类。

The Terminator ___trilogy might be one of the most obvious examples, where machines evolve beyond our control and nearly exterminate all human beings.

她写了一部成为畅销书的奇幻三部曲。

She wrote a fantasy ___trilogy that became a bestseller.