| ประโยคภาษาจีน : 中文句子 | 
|---|
|  rú guǒ如果  zhēn de真的  cún zài存在  zhè yàng这样  de的  xíng xīng行星  tiān wén xué jiā天文学家  zhì shǎo至少  shí十  nián qián年前  jiù就  yīng gāi应该  kāi shǐ开始  gēn zōng跟踪  guān chá观察  le了  hái yǒu还有  rú guǒ如果  zhēn de真的  cún zài存在  xiàn zài现在  ròu yǎn肉眼  yīng gāi应该  kě yǐ可以  kàn jiàn看见  le了 | 
| If such a collision were real, "astronomers would have been tracking it for at least the past decade, and it would be visible by now to the naked eye, " it added. |