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lý thuyết
The new theory explains swamp lights.=
giả thuyết
Their hypothesis links methane to electrical sparks.=
đề xuất
Volta proposed the idea in 1776.
manh mối
The experiment offered a new clue.
dữ liệu
They collected data on light emissions.
bằng chứng
There’s strong evidence for micro-sparks.=
nhà nghiên cứu
The researcher studied methane bubbles.=
sự quan sát
Careful observation revealed micro-lightning.=
đã nghỉ hưu
The retired chemist still studies folklore.=
thời hiện đại
Modern-day sightings are rare.=