In general, the disease mechanism is a two fold process; decreased RBC lifespan and decreased RBC production.

一般来说，该病的发病机制是一个双重的过程；红细胞寿命缩短，以及红细胞生成量减少。

He stiffened, laid the snapshot down and drew the two folded bills from his pocket and tossed them on the bed.

他僵住了，放下快照，从口袋里掏出两张折叠起来的钞票，扔在床上。

The larynx is also called the voice box because it contains the vocal cords, which are two folds of mucous membrane that can open and close like curtains.

喉也称为“声匣/喉头”，因为声带位于此；声带本质上是两片黏膜，就如同两张能开合的帘子。

If you just took them without any other evaluation of other risk factors like LDL cholesterol, blood pressure, diabetes, etc, it's almost two fold higher compared to the lowest risk group, which would have levels between 40 to 60.

如果只是讨论它，而不对低密度脂蛋白胆固醇、血压和糖尿病等其他风险因素做任何评估，那么它导致的风险几乎是最低风险组的两倍，而后者的水平在 40 至 60 之间。