四与十的乘积是四十.The product of 4 and 10 is 40.可以看出,术语 “ 内乘积功 ” 有两种解释.It will be seen that the term " internal work product " is ambiguous.点积是三个标量的乘积, 所以是个标量.The dot product, being the product of three scalars, is a scalar....
以改性Y分子筛为催化剂,γ-丁内酯和乙醇胺为原料,采用γ - 丁内酯法两步合成N - 羟乙基吡咯烷酮 ( NHP ).N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps....
Far off to the west the sun was sinking...远处夕阳西下。Far off to the west the sun was sinking.远处夕阳西下。The morale of the enemy troops is sinking lower every day.敌军的士气日益低落。The prices are sinking.物价下跌了。I began to have a sinking f...