I call X, trying to keep the note of complaint out of my voice.

我打电话给X。我尽量控制着自己，不让我的声音露出抱怨的成分。

youdao

Pluck the instrument once per second to keep the note 'fresh' while you are tuning.

当调校弦乐器（定弦）时，应每秒弹拨一次，以保持音符“清新”。

youdao

If you want to remember to take a medication with lunch, put the pill bottle on the kitchen table—don't leave it in the medicine chest and write yourself a note that you keep in a pocket.

如果你想在午餐时记得吃药，把药瓶放在厨房的桌子上——不要把它放在药箱里，并给自己写一张纸条，放在口袋里。

youdao

Then he'd write on a little note " and hand it to the guy and say just keep this note.

之后金匠会将其记录到一张票据上,交给他个人并且对他说：“保留好这张票据。

耶鲁公开课 - 金融市场课程节选

To save interest charges, the government wants to prepay the note, but Citibank, which wants to keep the asset on its books, says this goes against the spirit, if not the letter, of their agreement.

ECONOMIST: Mexican banks

Note to the lab coats: Keep the ideas coming.

FORBES: Companies & Strategies

Since the presumably alcoholics anonymous-approved Wizmark urinals can't keep everyone from getting a little tipsy, officials in Victoria, British Columbia are taking a note from European countries to keep urine off the streets.

ENGADGET: Urilift: the disappearing public urinal (and we do mean public)