每个坐标所乘的变分参数叫定标因子.The variational parameter multiplying each coordinate is called a scale factor.在市场上也可以买到大量的定标器和计数率计.A great profusion of scalers and ratemeters is available commercially.利用的定标星越多,计算的精确度就越高.The calculatio...
N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps.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 )....
我寄了信, 但留了份影印本存档.I sent the letter, but kept a copy for my files.校长把我校的所有报告都存档保存.The principal keeps all our school reports on file.清点完所定购的每一件东西后，将这份记录存档。Once you've checked off the items you ordered, put this record...
油轮紧卡在礁石中间动弹不得。The tanker is stuck fast on the rocks.海水冲击礁石, 激起高高的浪花.Swashing against the rocks, the breakers sent up a fountain of spray.海浪冲击着礁石, 飞起像珠子般的水花.The wave lashed against the rocks, sending up pearly spray....