He fired and hit the outermost ring of the target.

他开枪射中了靶子的最外一环。

《牛津词典》

Figure 1 shows these target platforms in the thin ring surrounding the core.

图1把这些目标平台放在围绕核心的简单环形结构中。

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Figure 1 shows these target platforms in the thin ring surrounding the core.

图1把这些目标平台放在围绕核心的简单环形结构中。

youdao