英语语法分析

Thrush is a degeneration of the frog with a secondary bacterial infection that begins in the central and collateral sulci.

鹅口疮是青蛙的退化，继发于中央和侧沟的继发细菌感染。

The left cerebral hemisphere is smaller with deeper sulci and narrower gyri.

左侧的大脑半球小于右侧，脑沟较深，脑回也比右侧狭窄。

Results: Superficial sulci and gyri of brain were showed clearly and identified easily on CT images of the aged.

结果：大脑表面沟回在健康老年人CT图像上显示清楚，易于辨认。