英语语法分析

An unreinforced trial is when you get the food without the bell.

非强化尝试是只有食物而没有铃声的时候。

An unreinforced response is when the bell goes on but there's no food.

非强化反应是有铃声但却没食物的时候。

Unreinforced, medium high viscosity polybutylene terephthalate resin for extrusion and injection molding.

无加强，中高粘度聚对苯二甲酸丁二酯树脂的挤出和注塑成型。