写论文时，遇到了几个问题. 还请各位大师帮忙, 谢谢...
1. Assume that they are equal and elliptic discs.
这句话是否改成
Assume that they are equal elliptic discs.
会比较好?
2. 当遇到 either ... or ... 时, 该不该加上个逗点?
例如:
either A or B and B' ...
(但这里的 B 与 B' 是一起的)
所以我是否该加上个逗点变成
either A, or B and B' ... ?
谢谢...

1 可以2. 如果只是 symbolic logic 的话，可以用 []如 either [A] or [B and B']如A与B仅是代号，原句则有词或句，那可用豆点如 either she opened the door, or John was hereand John did not close the door...

wow tengharold must have studied logic before

谢谢各位..