1. 光度計(jì)用來測(cè)量光的性質(zhì)、尤其是光的強(qiáng)度和通量的儀器
   An instrument for measuring a property of light, especially luminous intensity or flux.
2. 單位面積上的發(fā)光強(qiáng)度。
   The luminous intensity on unit area.
3. 把鋁和其他金屬混合，科學(xué)家們能夠制造出各種合金，其中一些具有鋼一樣的強(qiáng)度，但其重量只是鋼的三分之一。
   By mixing aluminium with other metals, scientists have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much.
4. 金屬有許多有用的性能，其強(qiáng)度是首要的。
   Metal has many useful properties, of which strength is the most important.

強(qiáng)的英語翻譯：

度的英語翻譯：