The U.S.Food and Drug Administration sent a warning letter to the drugmaker at the time, saying it had waited more than a year to notify regulators after getting complaints of customers becoming sick.
美国食品药品监督局那时发了一封警告给制药商并称其在收到消费者致病投诉一年多才上报监管部门。
Please note, any kind of complaints should be addressed to Mr. White by letter.
注意，请以信件形式向怀特先生投诉。
Today, our customer sent a letter of formal complaints to our General Manager.
今天，偶们的客户给总经理发了一封正式的投诉信。
Today, our customer sent a letter of formal complaints to our General Manager.
今天，偶们的客户给总经理发了一封正式的投诉信。
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