1. With scarcely a glance at the items, the clerk sweeps them across an aperture, where a special marking on each item is scanned by a low-powered laser beam inside the machine, connected to a remote computer.
    收款员几乎不看商品，只是把商品从机器上的孔眼处一扫而过，机器里的低能量激光对商品上的一个特殊标志进行扫描，这台扫描机与另一台电脑相联。

2. He gave the guests a cursory glance.
    他朝客人们草草地看了一眼。

3. At first glance, this is just another routine flight to Los Angeles, California.
    乍一看，这不过是又一架飞往加州洛杉矶市的普通班机。

4. At first glance, there would seem to be little that's new here.
    乍一看来，此说并无新意。

5. One can tell the difference almost at a glance,
    人们几乎一眼就能看出二者的差异，