英语语法分析

Infected maize crops have wrinkled leaves, no cobs at all and generally stunted growth.

受感染的玉米叶子起皱、根本没有玉米穗轴，而且通常生长迟滞。

In colonial times in America (late 1700's) it was still common to use corn-cobs or leaves.

而即使在殖民时期的美国(18世纪后期)，玉米穗或树叶仍是主要洁身工具。

The birds have a taste for sunseeds and also pick on corn kernels from the cobs, often ruining them.

鸟类很喜欢吃葵花籽，还能把玉米粒从玉米穗上叼下来，常常造成毁灭性的破坏。