from a (something) perspective

You can think about an idea in many ways. You can think about how much it costs, or how long it takes, or how beautiful it is. When you talk about an idea and want to explain how you're thinking about it, you use "from a ___ perspective" at the beginning or end of your sentence:

It makes sense from a business perspective, but for consumers it's not very easy to use.

whether (clause)

"Whether" is similar to "if". You can use them in the same way:

I'm trying to decide whether I should take my laptop.

I'm trying to decide if I should take my laptop.

You might choose to use "whether" instead of "if" just because of the sound. "Whether I" sounds easier to pronounce than "if I".

In written English, you should follow "whether" with "...or not":

I'm trying to decide whether I should take my laptop or not.

You can also use "...or not" in spoken English, but you should put it right after "whether":

I'm trying to decide whether or not to take my laptop.

design

"Design" is the skill and craft of creating things that look good and work well. There are lots of different kinds of design:

• Graphic design is about making things like advertisements, book covers, posters, and so on.
• Web design is about making web pages that look good and work well.
• Industrial design is about making products that people use: lamps, car seats, food packaging, computer accesories, etc.
• Interior design is about decorating a home or business.

Someone who designs things is called a "designer".

(something) will work

Use the phrase "___ will work" to say that something is going to be OK. For example:

A: Can you meet this afternoon at 4:00?

B: Yeah, that'll work.