[貴社の一層のご協力をお願いたします]は英語では； I would appreciate your continued cooperation. We would appreciate it if you would continue to cooperate with us. Your continued cooperation would be appreciated.

I would appreciate your continued cooperation. We would appreciate it if you would continue to cooperate with us. Your continued cooperation would be appreciated.

I would appreciate your continued cooperation. We would appreciate it if you would continue to cooperate with us. Your continued cooperation would be appreciated.