He unlocked the door of apartment two and disappeared inside after a backward glance at Larry.

他打开2号公寓的门，向后瞥了拉里一眼，然后走进去就不见了。

The current US farm bill, however, is a big step backward.

然而，目前的美国农业法却倒退了一大步。

We need to accelerate the pace of change in our backward country.

我们应当为我们这个落后的国家加快变革的步伐。

research into teaching techniques to help backward children.

对帮助后进生的教学技巧的研究。