monthly:月刊;quarterly:季刊;所以半月刊应该是:biweekly,bi的意思是two(二),两周一期,当然是半月刊.如著名杂志就是一种biweekly.再请看这两个英文例子:National Review is a biweekly magazine that reports and analyze
for a monthly magazine.他为一家月刊杂志撰写短篇小说。 lot of damage was caused when the magazine exploded.弹药库爆炸时造成很大损失。 library subscribes to 40 magazines.这个图书馆订购四十种杂志。