The polonium itself, with its rarity and trail of irradiated locations (see article) ought to be a telling clue.
由于钋本身稀有且所过之处留下的放射可被追踪（另见他文），应该能成为发掘信息的线索。
The polonium itself, with its rarity and trail of irradiated locations (see article) ought to be a telling clue.
由于钋本身稀有且所过之处留下的放射可被追踪（另见他文），应该能成为发掘信息的线索。
应用推荐