promotional activity的用法和样例：
例句
- Businessmen attract customers through all kinds of promotional methods.
商家们通过各种促销手段来吸引消费者。 - A firm may not use all of these promotional techniques to move a product,but many will rely on two or three of them because one alone cannot usually do the job.
一个企业可能不会用所有这些促销手段来推销产品，但是许多企业会运用其中的两种或三种促销手段，因为仅靠一种手段往往不能奏效。
