Selenium is a chemical element. Its symbol is Se. In large amounts it can poison you; living bodies also need a very small amount of it.

Selenium是一種 is a chemical element化學元素 Its symbol它的符號 is Se是Se In large amounts份量大的時候 it can poison you它會讓人中毒 living bodies also need a very small amount of it不過生物體也需要極少量的它

It was used in older electrical instruments because it reacts to light: when light hits it, the way electricity moves through it changes, so people built parts that could “feel” brightness. You will meet the word in science class more than in daily talk.

It was used in older electrical instruments它曾被用在早期的電子儀器裡 because it reacts to light因為它對光有反應 when light hits it光照到它的時候 the way electricity moves through it changes電流通過它的方式會改變 so people built parts因此人們做出一些零件 that could "feel" brightness能「感覺」到亮度 You will meet the word你會在 in science class科學課 more than in daily talk比在日常對話中更常遇到這個字

A Swedish chemist, Jöns Jacob Berzelius, named it in 1818, from the Greek word for the moon. He chose that because this substance had been mixed up with another element, tellurium, whose name comes from the word for Earth — so this one became the “moon” neighbour.

A Swedish chemist, Jöns Jacob Berzelius一位瑞典化學家Jöns Jacob Berzelius named it in 1818在1818年為它命名 from the Greek word for the moon取自希臘文裡「月亮」這個字 He chose that他這麼選 because this substance had been mixed up with another element因為這種物質曾經被誤認成另一種元素 tellurium也就是碲 whose name comes from the word for Earth碲的名字來自「地球」這個字 so this one became the "moon" neighbour所以這個新元素就成了它的「月亮」鄰居

It is not silicon (that is a different element, used in computer chips), and it is not “saline” (that means salty). Those only brush it in sound.

It is not silicon它不是矽 (that is a different element那是另一種元素 used in computer chips用在電腦晶片裡的) and it is not "saline"它也不是saline鹹的 (that means salty那個字是「鹹的」的意思) Those只是 only brush it in sound在讀音上跟它有點像而已