Knee injuries, especially to the anterior cruciate ligament (ACL), are some of the most common and serious, the new study found.

新的研究发现，膝盖受伤，特别是前十字韧带(ACL)受伤，是最普遍和最严重的。

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As you begin to bend forward, the spine moves while the pelvis and sacrum tend to remain behind, especially on the side with the knee drawn back.

当你上体前屈时，脊椎向前移动，但骨盆和骶骨却要保持在原处，特别是屈膝的一侧。

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The sharpness of the F23 was very impressive, especially when you do the comparisons to 35mm in head-to-foot and head-to-knee shots of people, when sharpness becomes critical.

F23的清晰度十分出色，尤其是在拍摄人物全身和膝盖半身的时候，同35毫米相比，清晰度的重要性就非常突出。

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In order to facilitate cartilage repair, especially in knee injuries, the cartilage is typically replaced.

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"The medical device business, especially the hip and knee replacement business, has been an outstanding business, " Schiff admits.

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"You can see in her right knee, especially on the medial side, she has no space left between her femur and her tibia, " he said.

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