sources

• The density logger consists of a radiation source .
  密度测井仪包括辐射源。
• Every tree has its roots and every river has its source .
  木有本，水有源。
• Every star is a copious source of neutrinos .
  每颗恒星都是丰富的中微子源。
• Reductant from an extraneous source is introduced .
  外来的还原剂被引进来。
• It was at once property and source of food .
  这既是他的财产，又是他的饭碗。
• They had at least one source or input node .
  它们至少有一个发点或输入节点。
• There are many other energy sources in store .
  还有许多种其它能源尚未开发。
• There is another source of novelty .
  另外有种新事物的源泉。
• My income is taxed at source .
  我的收入已先行扣除了所得税。
• We quickly learned the source of the excitement .
  我们很快就知道了愤慨的原因。