An animal will show different responses for a primary response and a secondary response as shown in the figure.

如图所示，实验动物对初次免疫和二次免疫的应答有明显的不同。

The two primary response periods are: after a page has been submitted, and immediately after user focus leaves a field.

两个主要的响应时期是：页面提交之后，或在用户的焦点离开字段时立即响应。

Until recently the business world's primary response was to pitch diets, workouts and potions to those determined to melt off the pounds.

最近，世界商业对那些决心减肥的人的反应主要定位于炒作饮食、锻炼、药剂方面。