We tend to meet up for lunch once a week.我们往往每周共进一次午餐。Lung cells die and are replaced about once a week.肺细胞约每周新老更替一次。Meat was available once a week if at all.就算有肉，也是每周才吃一次。...
He has had a keen and lifelong interest in astrological research.他毕生热衷于占星术研究。Commencing in 1474, mathematical, astronomical and astrological works appeared in printed form.从1474年起, 数学 、 天文学和占星术的著作开始印刷出版了.What is your ast...