大小約如聖母峰
A huge asteroid called 1998 OR2 is expected to fly by Earth next month, with its estimated size similar to that of Mount Everest.
一顆名為「1998 OR2」的巨大小行星下個月將掠過地球，它的大小約等同於聖母峰。
asteroid(n.)小行星be expected to Vr預計將要estimate(v.)估計（數據）that=the size
Asteroids have been paying Earth visits perhaps since the formation of our planet, but 1998 OR2, or 52768, has raised concerns due to its size and speed.
小行星自從地球形成以來就會經過地球，但「1998 OR2」，又稱為「52768」，之所以引起關注是因為它的大小和速度。
formation(n.)形成、結構raise concern 引起關切、擔憂
NASA has long been monitoring space and its possible threats to Earth, and this asteroid was first spotted in 1998.
NASA長久以來監測外太空和其可能對地球所造成的威脅，而這顆小行星「1998 OR2」，在1998年首次被觀測到，
has been Ving 現在完成進行式monitor(v.)監控(n.)螢幕observe(v.)觀察、觀測threat(n.)威脅
At that time, NASA said the asteroid was “large enough to cause global effects” and was “potentially hazardous.”
當時NASA指出這顆小行星「大小足以影響全球」且「有潛在威脅性」，
global(adj.)全球的hazardous(adj.)危險的=likely to cause damagehazard(n.)危害、隱憂
The asteroid is estimated to be up to 2.5 miles wide in diameter with a flying speed of 19,461 miles per hour.
預測直徑可達2.5英里，且飛行速度為每小時19,461英里。
diameter(n.)直徑
The flyby is expected to take place on April 29, with a distance of around 6.3 million kilometers at its nearest point to Earth.
1998 OR2即將在4月29日飛越地球，最近距離會達到離地約630萬公里。
Though the asteroid is considered to be possibly dangerous, it doesn’t necessarily mean that it is going to collide with Earth.
雖然被判定為俱有潛在威脅，但並不表示它一定會撞擊地球。
not necessarily不見得、不一定collide with~ 與...相撞、碰撞
According to the Near-Earth Asteroid Tracking system, 1998 OR2 is only going to skim past Earth without any potential impact.
根據「近地天體監控系統」，1998 OR2只會掠過地球，不會造成任何衝擊。
skim(v.)掠過（表面）skimmed milkpotential(adj.)潛在的、可能的impact(n.)衝擊
Eleanor Helin, Principal Investigator of the NEAT system, had this to say in a statement: “Our goal is to discover and track all the potentially dangerous asteroids and comets long before they are likely to approach Earth.”
系統首席研究員海琳表示：「我們的目標是在接近地球之前，就發現並追蹤所有可能帶來威脅的小行星及彗星。」
investigator(n.)調查員track(v.)追蹤（路徑、進展）
Given its estimated trajectory, NASA is certain that the asteroid isn’t going to pose any harm during its flyby.
根據估算的路徑推估，NASA確定在掠過地球時不會造成任何威脅。
trajectory(n.)彈道、飛行軌跡pose a threat to對…造成威脅
With that being said, as the consequences of 1998 OR2 hitting Earth could be tremendous, NASA will continue to closely monitor the asteroid.
話雖這麼說，「1998 OR2」若撞擊地球的後果可能很慘重，NASA會持續嚴密監控這顆小行星。
tremendous(adj.)巨大的=huge=enormousconsequence(n.)(負面)後果result=outcome(一般)結果
One thing for sure is that people need not panic or overreact over this celestial event.
可以確定的是，民眾不需因為這顆小行星而恐慌或反應過度。
panic(v.)(n.)恐慌、驚慌overreact(v.)反應過度celestial(adj.)天空的、天體的