We cannot afford the risk of losing a class of first-rate insecticides with no suitable replacements ready to step in and do the same job.

我们无法承受在失去这类一流杀虫剂的同时，没有适当的替代品加入进来并起到同样的作用。

youdao

The second line (in Python 2.2 and above) tells Psyco to do the same with class methods. To target Psyco's behavior a bit more precisely, you can use the commands.

第二行(在Python 2.2及以上版本中)告诉Psyco对类方法执行相同的操作。

youdao

But Hutchings argues that the sketch actually shows blocks on the ground being pulled by a weight attached to a pulley—the same type of experiment you might do today in a high school physics class.

但是哈钦斯却认为，在这张草图中，放置在地上的数个方块由配有滑轮装置砝码拖动——这和高中物理课上做的实验类型简直如出一辙。

youdao

We've still got to address this basic challenge of how do we build a strong middle class and make sure that the next generation has the same opportunities that we did.

WHITEHOUSE: Remarks by the President at a Campaign Event