ball and socket

基本解釋

In the diseased hip, the "ball and socket" become irregular, rough, and deformed, causing pain and decreased range of motion (Figure 1).
在髖關(guān)節(jié)病變的“球窩”變成不規(guī)則，粗拙，變形，導(dǎo)致疼痛和關(guān)節(jié)活動(dòng)范圍減?。▓D1）。
They made joints in stone keeping the lintels in place horizontally using a tongue and groove joint and subsequently fixing the upright and lintel with a ball and socket joint or mortice and tenon.
石匠們用楔口連接法將楣石水準(zhǔn)放置，將石塊連接起來(lái)，然后將這些直立的石塊和楣石用球窩接頭或楔口接頭來(lái)固定。
They made joints in stone keeping the lintels in place horizontally using a tongue and groove joint and subsequently fixing the upright and lintel with a ball and socket joint or mortice and tenon .
石匠們用楔口連接法將楣石水平放置，將石塊連接起來(lái)，然后將這些直立的石塊和楣石用球窩接頭或楔口接頭來(lái)固定。

Seeing exactly how certain joints work was a good refresher for me (remember learning the difference between hinged joints for the elbow, and ball-and-socket, like the hips?), and following the blood flow into and out of the heart always makes me wonder at the fine-tuned machinery of the human body.
FORBES: Google Body lets you explore what's under your skin