重點講解：
1.by accident 偶然地；意外；不小心
例句：I found out the secret of the matter by accident.
我偶然發現了那件事情的秘密。

2.at random 隨便地；隨機地
例句：The children sat around the table at random.
小孩們隨便的圍坐在桌子旁邊。

3.with the odds 可能性
例句：Even with the odds of detecting dark matter not in their favor, astrophysicists maintain an unwavering optimism.
對于天體物理學家們來說，盡管發現暗物質的可能性并不大，但他們一貫保持著樂觀的態度。

4.grind to a halt 慢慢停下來；慢慢停止
例句：Every thirty seconds, the server experiences a huge storm of disk-writing activity, causing the system to nearly grind to a halt.
每隔30秒，服務器就會遇到磁盤寫活動高峰，導致系統幾乎陷于停頓。