1.strengthen v.加强,变坚固

例句：Shared activities can also strengthen the bond between fathers and their children.
      共享活动还可加强父亲和孩子们之间的亲情关系。

2.frequency n. 频率,周率;频繁,屡次

例句：A loudspeaker designed to reproduce bass frequencies.
     低频扬声器设计用来再现低音频率的扬声器。

3.interference n.干涉,干预;妨碍,打扰;抵触,冲突;干涉,干扰

例句：How annoying! There's so much interference.
      多气人啊!有这么多干扰。

4.connect v.连接,连结

例句：Wait a moment and I will connect you with accounting.
      请稍等，我帮你把电话接到会计部。

5.slither vi.不稳地滑动，使滑动

1.They said his dream of building a large and important radio network would never come true.

come true实现,达到

例句：At first, their predictions seemed destined to come true.
       起初，他们的预测好像注定会成为现实。

2.William Paley was always looking for people with special skills.

always表示总是做某事，带有一定的感情色彩。with special skills介词短语做后置定语。