| 1. | Fully-grown hookworms in the gut are 2 to 3 cm long .
在肠内发育成熟的钩虫长2--3厘米。 |
| 2. | A flexible pavement has a wearing surface which is often only 5 cm thick .
柔性路面的磨耗层往往只厚5厘米。 |
| 3. | Secondary roots emerge on the 4th or 5th day about 4 or 5 cm from the root apex .
在第四或第五天，距根端大约4或5厘米处发出次生根。 |
| 4. | No concrete road surface is thinner than 10 cm since any smaller thickness might break up .
混凝土路面不能薄于10厘米，因为再薄就可能断裂。 |
| 5. | The permanent radiation of the sun would become measurable for wavelengths exceeding 20 cm .
结果是波长超过20厘米的太阳的永久辐射变得可以测量了。 |
| 6. | The image of the right face is therefore inverted(m is negative)and is a square 1 cm on a side .
因此，右侧面的像是倒立的（m为负），边长为1厘米的正方形。 |
| 7. | The primary mirror is 80 cm in diameter, a respectable size even for an observatory on the ground .
主镜的直径为80厘米，这一口径即使在地面天文台也是很可观的。 |
| 8. | If all the seeds germinate at one time, they can be removed for planting when the radicles are 0. 5 to 1 cm long .
如果全部种子在同一时间发芽，则当胚根长到051厘米时移出去栽植。 |
| 9. | Occlusion, when present, is found in large extramyocardial coronary arteries, usually within 1 to 2 cm of their origin .
闭塞一旦出现，通常可在心肌外大冠状动脉中离起点1-2厘米内找到。 |
| 10. | A displacement of the platinum electrical contacts of some 0.05 cm in any horizontal direction will start the recording cycle .
只要铂白金电触点沿任何水平方向移动大约0.05厘米，便可起动记录器运转。 |
