They had to be careful of floating chunks of ice.

他们必须当心大块浮冰。

...a chunk of meat. [+ of]

一大块肉

Cut the melon into chunks.

把瓜切块。

The company owns a chunk of farmland near Gatwick Airport. [+ of]

该公司拥有盖特威克机场周边的大片农田。