2. It's always hard to speculate about the future.
推测未来总是很难的。
《柯林斯英汉双解大词典》
3. It's tempting to speculate about what might have happened.
大家不禁猜测，到底发生了什么事。
《牛津词典》
4. This has led scientists to speculate on the existence of other galaxies.
这就使得科学家推测还有其他星系存在。
《牛津词典》
5. We can speculate that the stone circles were used in some sort of pagan ceremony.
我们可以推测，这些石头排成的圆圈是用于某种异教崇拜仪式的。
《牛津词典》
6. The doctors speculate that he died of a cerebral haemorrhage caused by a blow on the head.
医生们猜测他死于头部撞击引起的脑溢血。
《柯林斯英汉双解大词典》
7. I mean it's interesting to speculate.
我的意思是，这是很有趣的推测。
youdao
8. He has bought himself time by refusing to speculate publicly on the cause of the blast.
他拒绝公开推测爆炸原因，为自己赢得了时间。
youdao
9. He refused to speculate on the possible effects on relations between the two governments.
他拒绝猜测这对两国政府关系可能产生的影响。
youdao
10. Other researchers speculate that sauropods ingested these stones as a source of some the minerals they needed, such as calcium.
其他研究人员推测，蜥脚类动物吞食这些石头是为了获取它们需要的一些矿物质，比如钙。
youdao
11. The researchers speculate that craft activities promote the development of nerve pathways in the brain that help to maintain cognitive health.
研究人员推测，手艺活动促进了大脑神经通路的发展，有助于保持认知健康。
youdao
12. "We can only speculate as to how the Egyptians could have laid out these lines with such precision using only the tools they had," Dash writes.
达什写道：“我们只能猜测，在仅用当时的工具的情况下，埃及人是怎样做到如此精确地铺线的。”
youdao
13. Some scientists speculate that Mars may have enjoyed an extended early period during which rivers, lakes, and perhaps even oceans adorned its surface.
一些科学家推测，火星在早期很长时间里可能都有以河流、湖泊，甚至海洋装点着它的表面。
youdao
14. Studies on nonalien species have not produced similar results, leading researchers to speculate that avian social learning may be fundamentally different from that of mammals.
15. This, in turn, has a major effect on their diet, leading scientists to speculate that the ability to learn population-specific hunting methods could be driving the animals' genetic development.
