| 1. | Awful. you can't walk upright .
别扭死了，走路挺不起腰来。 |
| 2. | Why did humans evolve to walk upright
人类为何进化到了直立行走的姿态？ |
| 3. | Well , that ' s impossible . i walk upright
可是,那是不可能的,我直立行走 |
| 4. | He can walk upright and meet his friend or his enemy
他可以挺起胸膛去面对他的朋友和敌人 |
| 5. | . . man can walk upright
. .人们可以仗义执言 |
| 6. | Man can walk upright
.人们可以仗义执言 |
| 7. | The remains of a tail lost long before man began to walk upright six million years ago
六百万年前人类开始直立行走很早以前，尾部的残余就丧失了。 |
| 8. | The chimps were measured both while walking upright and while moving on their legs and knuckles
研究人员对大猩猩在直立行走和四肢着地行走时消耗的氧气量分别进行了测量，并将结果与人类的进行了对比。 |
| 9. | The human thumb made man . its development was as important an event in man ' s growth as his success in learning to walk upright
拇指造就了人类。在人类的演变过程中，拇指的进化和学会直立行走是同等重要的大事。 |
| 10. | Why did humans evolve to walk upright ? perhaps because it ' s just plain easier . make that " energetically less costly , " in science - speak
人类为何进化到了直立行走的姿态？可能这是因为直立行走要容易得多。用科学术语来说，直立行走能“节省能量” 。 |
