Isometrics are exercises employing static muscle contractions.

静力训练是一种使用静态肌肉收缩的运动。

Muscle contraction can be split into three main types.

肌肉的收缩可以被分为三种主要类型。

They directly and efficiently convert electrical energy into muscle contractions.

它们可以直接高效地把电能转化成肌肉收缩。

Muscle contraction, transporting molecules throughout the body, synthesizing DNA, etc.

肌肉收缩，在全身运输分子，合成脱氧核糖核酸等。

These living muscles efficiently convert chemical energy that comes from nutrients into muscle contractions.

这些活肌把来自营养素的化学能量高效地转化为肌肉收缩。

It works by blocking the release of a neurotransmitter called acetylcholine, which controls muscle contractions.

乙酰胆碱的释放。乙酰胆碱正是神经控制肌肉收缩的那道指令。

The patient has to be able to produce two independent signals or, or muscle contractions.

病人必须能够产生两个独立的信号或肌肉收缩。

It regulates nerve impulses, muscle contractions and maintains the body's balance of water and minerals.

盐可以调节神经脉冲的传递、肌肉收缩，并维持体内水分和矿物质的平衡。

To better understand myasthenia gravis, let's review normal muscle contraction but at the cellular level.

为了更好的理解重症肌无力，我们从细胞水平来了解一下肌肉正常收缩时的状态。

Muscle contraction expands the chromatophores and helps them change the skin color to match its surroundings.

通过肌肉收缩扩散色素细胞，章鱼以此改变自身肤色融入周围环境。