Sometimes, by buying something cheap now, you will be costing yourself more in the long run.
有时候你花了很少钱买了便宜货,但它日后可能要花掉更多的钱。
But instruments far more delicate than that were needed if any really serious advance was to be made.
但是,如果要取得真正重大的进展,需要有比这种装置精细得多的仪器。