第四个

Delta is the fourth letter of the Greek alphabet.

δ是希腊字母中四个字母。

Hick pouched his fourth catch with ease.

希克轻松地接住了四个球。

Perhaps the positions of the three pyramidical images in the crystal sphere hold the long-sought key to finding a fourth, as yet unfound.

也许在水晶球体三个金字塔形图像位置有苦苦寻找现四个金字塔钥匙,目前为止还有现。