农民常常受变幻莫测的天气摆布。

Farmers ___are ___at ___the ___mercy ___of unpredictable weather.

孩子们被留给不负责任的保姆照看，听凭其处置。

The children ___were left ___at ___the ___mercy ___of their irresponsible babysitter.

在数字时代，许多企业的命运掌握在复杂的算法手中。

In the digital age, many businesses ___are ___at ___the ___mercy ___of complex algorithms.