来自MSN2 个月
Spectacular award-winning £53.5m bridge with twisted shape that's the first of its kind
The Helix Bridge, officially dubbed The Helix, is an engineering marvel found in Singapore. Previously known as the Double Helix Bridge, this £53.5million immense structure serves as a pedestrian ...
Nature5 年
double helix
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they ...