At the peak of the movement, squeeze your pectoral muscles together for one-count if you can.

在繁忙的运动，你的胸肌挤压在一起一数，如果你能。

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Objective to study clinical effects of modified radical mastectomy with preservation of major and minor pectoral muscles.

目的探讨保留胸大、小肌改良乳腺癌根治术的临床疗效。

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Three months into the plan, I realized that I needed to make some adjustments: I was over-working my pectoral muscles, so I decided to work them less frequently.

执行计划三个月之后，我意识到我需要做一些修改：我对我的胸肌做了过多的练习，所以我决定减少练习的次数。

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You can then incorporate arm raises in multiple directions and also perform a "chest fly" motion to work the pectoral muscles directly.

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They saw a few features that are unambiguously those of dinosaurs - notably what is called an "elongated deltopectoral crest" that served as an anchor for strong pectoral muscles.

BBC: New contender for oldest dinosaur