Certainly! Here's how you can express the phrases you've provided in Business English:

1. 广交会 (Canton Fair):
- The Canton Fair: "I am planning to attend The Canton Fair."
- Note: "Canton Fair" is a proper noun and is widely recognized in international trade contexts.

2. 商务英语中级 (Business English Intermediate):
- Business English Intermediate Level: "I am currently studying at the Business English Intermediate Level."
- Or for registration purposes: "I would like to enroll in the Business English Intermediate Course."

3. 报名 (Registration):
- "I would like to register for the course/fair."
- For the context of the Canton Fair: "I am interested in registering for the upcoming Canton Fair."

4. 不好意思 (Apology):
- "I apologize for any inconvenience caused."
- Or if you're asking for something: "I'm sorry to trouble you, but could you assist me with registration?"

5. 宣传 (Promotion):
- "We are conducting a promotional campaign for our products at the Canton Fair."
- Or for self-promotion: "I would like to promote my intermediate Business English skills for potential job opportunities."

To ensure SEO optimization, here's the structured format:

**Description**:
Phrases translated into Business English for the Canton Fair context, including registration, apologies, and promotional language.

**Keywords**:
- Canton Fair
- Business English Intermediate
- Registration
- Apology
- Promotion

**正文**:
"I am planning to attend The Canton Fair and would like to enroll in the Business English Intermediate Course. Please note that I am sorry for any inconvenience caused during the registration process. Moreover, I am looking forward to promoting my language skills and our products at the fair."

This structured response should provide the user with an SEO-friendly, detailed, and easily understandable answer to their question.