Zack's knowledge of car repair is completely theoretical, so he can't actually help fix the engine.

查克對修車的知識完全是理論上的，所以他實際上無法幫忙修理引擎。

The fact that an object in motion tends to stay in motion is one of the basic laws of physics.

動者恆動這個事實是物理學的基本定律。

The student solved every equation on the math test, earning a perfect score.

這名學生解出數學測驗上的每一道方程式，獲得滿分。

Darrell, who was adopted as a baby, is on a quest to find his birth mother.

達雷爾嬰兒時就被領養了，他要尋找親生母親。

A substance with a high amount of mass in a very small volume is quite dense.

在很小的體積中質量高的物質密度相當大。

It was only days after their conversation that Calvin understood the significance of what Selma had said.

直到他們談完話幾天後凱文才了解賽爾瑪所說的話的重要性。

The giant galaxy is made up of hundreds of millions of stars.

這個巨大的星系由好幾百萬顆星星組成。