空心球 clean shot ; nothing but the net ; swish ; Air ball
掌心球 palmball
开心球 KiKORiKi ; GoGoRiKi
健身实心球 medicine ball
家得宝中心球场 StubHub Center
向心球轴承 [机] radial ball bearing ; annular ball bearing ; redial bearing ; radial contact ball bearing
中心球 [细胞] centrosphere ; astrosphere ; [数] central sphere ; directive sphere
中心球场 Centre Court ; Verizon Center ; CENTER COURT
平均直径变动的调心球承也可带密封（图1.6）和一个终身油脂填充。
Self-aligning ball bearings of the mean diameter range are also available with seals (Figure 1.6) and a for-life grease fill.
这颗植物是一株心形球兰，因其叶子呈心形，常被称为“开心草”。
The plant, a hoya kerrii, is commonly called a "sweetheart plant" because of its leaf shape.
一个苹果、一把水果刀或苹果去心器、一个搓球机或勺子(任选)。
An apple a paring knife or apple corer a melon baller or spoon (optional).
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