if these ice chunks dam the river,and that can lead to devastating flooding in the town,when the dams burst.会阻塞大量流水堆积的冰块崩塌后会给小镇带来毁灭性的洪灾。

lead to:导致

The Government's present course will only lead to disaster.

政府的现行方针后患无穷。

Too much work and too little rest often lead to illness.

过量的工作和过少的休息会引起疾病。

the team set up their cameras in anticipation.团队架好摄像机机，静静等待

in anticipation:预先(预期)

I have take my coat and umbrella in anticipation of rain.

我估计有雨，所以带著外套和伞。

A pleasure is sometimes greatest in anticipation.

凡事在期待中最有乐趣。

Using cameras and sonar to assess the state of the river,菲利用摄像机和声纳检测河水的状况

assess:评定, 评估, 估算

She look at the house and assess its market value.

她看了看房子并估算了其市场价值。

It's difficult to assess the impact of the President's speech.

总统讲话的巨大影响很难估计。

tax, impose, assess这些动词均有“征税”之意。

tax普通用词，指用各种不同方法向个人或单位征收所得税、房地产税等各种税款。侧重实际征收金钱。

impose指在决定个别案件中的处罚或罚款，尤指政府征收某种税收的决定。

assess指一般情况下，征收房地产税、罚款或其它费用。