Adjust the needle thread tension properly.

请调节上线张力。

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Acus has several meanings including a "single-prong hairpin" or "needle and thread, " she says.

WSJ: On Pins and Needles: Stylist Turns Ancient Hairdo Debate on Its Head

But a needle and thread could.

WSJ: On Pins and Needles: Stylist Turns Ancient Hairdo Debate on Its Head

She watched as her grandmother struggled to thread a needle with fingers that were beginning to bend at odd angles, like old trees.

NEWYORKER: The Visitor