我们知道such as后面不要逗号,但是such as 前面有没有逗号呢?如果你仔细一点,会发现有时有逗号,有时没有逗号。这是因为有逗号和没逗号两种场合的such as所传递的意义不同。 Such as 通常有两个义项: 义项1 . for example : animals, such as elephants and tiger ...
1:2 : the ratio of one to two 12/3: 12 divided by 3 equals 4 x + 1: x plus one (a+b): bracket a plus b bracket closed x -1: x minus one x ± 1: x plus or minus one xy: xy; x multiplied by y (x - y)(x + y): x minus y, x plus y ...