variable

• An exponential function is one in which the variable appears in an exponent .
  指数函数是指数中出现变量的函数。
• A variable is a quantity to which an unlimited number of values can be assigned .
  变量是一个可以有无限数值的量。
• Accordingly the variables x and x are known as the system state variables .
  相应地,变量X和X就称之为系统的状态变量。
• A tabulation of a function of two variables is cumbersome, but possible .
  二元函数的列表法是不方便的，然而是可能的。
• These cells often have a variable chromosome number (aneuploid) .
  这些细胞的染色体数目不等（称为“非倍数染色体”。）
• The minimum number of state variables required is the order of the system .
  所需要的状态变量的最低数量是系统的阶次。
• A value index measures general changes in the total value of some variable .
  价值指数用以度量某些变量的价值总量变化。
• A continuously variable potentiometer is connected into the detector bridge network .
  在检测器桥路中，接有可调电位器。
• Variable levies can insulate farmers and consumers from world markets .
  差价进口税可以把农民和消费者与世界市场隔离开来。
• Replication is necessary because site conditions are always somewhat variable .
  重复是必须的，因为立地条件常常有些变化。