main bearings的用法和樣例：
例句
- If all the main bearings are quite loose, a great deal more noise will be evident and the frequency will increase.
如果所有的主軸承都很松動(dòng)的話(huà)，大量的噪音就會(huì )很明顯而且頻率會(huì )增加。 - The front cover exactly matches this shape and also has a raised circular area that fits into a matching countersunk area of the block in front of the main bearing.
封面完全匹配這個(gè)形狀和也提出了圓形區域，可以成為一個(gè)匹配埋頭面積塊前面的主軸承。
