great-great-grandparentsCOCA¹⁴⁵⁰⁹⁹BNC²³⁶²¹³⁺¹ 基本例句 🌏高祖父母 The most amazing thing about these butterflies is that they return to the very same tree in Mexico that their great-great-grandparents used the winter before. 这些蝴蝶最让人惊奇的是它们总能回到自己曾祖父母曾在墨西哥过冬时栖息的那棵树。 xmwaiyu