I'm sure it will work if you can persist.

我相信如果坚持的话一定会有效的。

1 work（机器或设备）运转

The computer doesn't work.I'd better buy a new one.

电脑不工作了。我还是买个新的吧 。

（想法，系统或方法）奏效

My plans finally worked.

我的计划终于奏效了。

If you want to lose weight by dieting.I'm sure it will not work.

如果你想通过节食减肥，我保证不会奏效。

（药物）起作用

The sleeping pill doesn't work for me.

安眠药对我不奏效。

2 persist 坚持

persist in doing坚持做..

He persists in quiting his decent job and traveling on a tight budget.

他坚持放弃相当好的工作，开始穷游。

A:I want to lose some weight!

我要减肥！

B:So do I.

我也是！

A:I have a yoga class tomorrow.Do you want to come with me?

我明天上瑜伽课，一起去吗？

B:No,it's too expensive for me.I've decided to take some exercises on my own.

不了，太贵了。我决定自己做些运动。

A:What are you going to do?

你打算做什么？

B:Run around the track.In the morning I run for an hour,and in the afternoon I run around the building.

去操场上跑步。早上跑一小时，晚上绕大楼跑一圈。

A:Good.I'm sure it will work if you can persist.

不错。我相信如果坚持的话一定会有效的。

B:I hope so.Would you like to join me?

希望如此。你愿意和我一起去吗？

A:Sounds good.

好啊。