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In 2018, researchers exploring an inactive volcano below the ocean off the coast of California were amazed when they caught sight of 20 pearl octopuses crowded together in a small crevice. Why were so many of these usually lone creatures gathering so closely together? The team then expanded their search to 823 acres of the sea floor, and their count of the octopuses quickly grew to an amazing 20,000. The scientists had discovered the largest of the world’s four known octopus gardens. It took another 12 visits and constant surveillance by a remote-controlled robot to find out the mystery of these mollusks’ activity. The researchers pieced together thousands of time-lapse photos to finally shed light on the phenomenon.
Using sensors to measure temperature, the researchers found the water around these octopus gatherings was between 5-10 degrees Celsius(°C). However, less than a meter away, temperatures dropped to 1.6°C. This significant temperature difference was due to nearby hydrothermal springs. The females were laying eggs on rocks in the warmer water and guarding them until they hatched. Further observation revealed that the young from these eggs hatched in less than two years, a sharp contrast to the typical 5-8 years required in colder conditions. This warmer environment greatly increases their chances of survival.
The army’s surveillance of the enemy base suggests there are at least 1,000 soldiers inside.
該軍隊對敵軍基地的監視表示裡面至少有 1 千名士兵。
Due to rising crime rates, Mr. Banks purchased several surveillance cameras for his property.
由於犯罪率上升,班克斯先生買了幾臺監視攝影機監控自己
的房產。
The judge agreed to release the suspect, but police will keep him under surveillance until the trial.
法官同意釋放嫌疑犯,但警方直到審判前會持續監視他。
Tom is introverted. By contrast, his brother John is extroverted.
湯姆很內向。相對之下,他哥哥約翰就很外向。
The puppy appears small in contrast to its mother.
這隻小狗和母狗比起來模樣小多了。
When you contrast Edward with Henry, you’ll find a big difference between them in terms of personality.
你將愛德華與亨利對比時,會發現兩人的個性有很大的差異。
The tropical island is located off the coast of Indonesia.
這座熱帶島嶼位處於印尼外海。
Many people claim to have caught sight of a UFO last night.
許多人聲稱昨晚看到了一個不明飛行物體。
The detective pieced together the events of the night.
偵探將那一晚發生的事件拼湊起來。
A recent study has shed light on the causes of climate change.
最近的一項研究闡明了氣候變遷的成因。
Tom is at risk of getting kicked off the soccer team.
湯姆有被踢出足球隊的風險。
The company is at risk of losing money this year.
這家公司今年有虧損的風險。