辨析四个表示 “分配” 的词：distribute、allocate、assign 和 apportion Episode 210324 / 24 Mar 2021 Listen to this programme and find out the ...

Ten is a foundation of mathematics, a cornerstone of the decimal system. It suggests completion, but also a building block.

From a single gold coin's journey through the centuries, to an ingenious screw that changed engineering, the extraordinary stories behind 100 of the most significant and intriguing artefacts in US ...

The scope of objects in Smithsonian collections is staggering—from ancient Chinese bronzes to the Star-Spangled Banner; from a 3.5 billion-year-old fossil to the Apollo lunar landing module; from the ...

In our world, we have different materials like wood, metal, plastic and glass. These materials are used to make the objects we see and use everyday. Each material has special properties that make it ...