1. Each tentacle is about two millimeters long. 每条触手大约两毫米长。
2. This entire apparatus fits on a chip no larger than a few square millimeters. 这整个装置可以被安置在不超过几平方毫米的芯片上。
3. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters. 热带草原的年降雨量在1000毫米到2000毫米之间。
4. The hypothesis is not undermined by observations that sea levels are falling relative to the Scandinavian coast by four millimeters a year. 尽管海平面被观测到相对斯堪的纳维亚海岸每年下降4毫米,这一假设并没有受到破坏。
5. The stamens are about three millimeters wide. 这些雄蕊的宽度为三毫米。