The body is short and free of concepts Claude already knows, but '功能说明' and '翻译规则' restate the same language-branching logic and the opening line echoes the title, so it could be tightened past anchor 2.

Concrete and complete for an instruction-only skill: an explicit 'fy <内容>' trigger format, four worked input→output examples, and a branching rule set covering Chinese, English, and other languages — guidance is actionable without needing code.

The '翻译规则' section lays out a clear numbered sequence (detect language → branch by language → return result) for a single unambiguous task with no destructive or batch operations requiring validation.

Under 50 lines with no need for external references, organized into well-labeled sections (触发条件, 功能说明, 使用示例, 翻译规则); no bundle files exist, so the simple-skills exception applies.

Names the translation domain and two concrete capabilities ('中英互译', '其他语种则翻译成中文'), but it is a narrow two-action list rather than the broad set of multiple concrete actions that anchor 3 calls for.

Explicitly states what it does (中英互译 / 其他语种→中文) and when to use it via an explicit '触发条件：输入 fy…' clause, the equivalent of a 'Use when' trigger, satisfying anchor 3.

Includes the explicit 'fy' command trigger plus the generic word '翻译' with a usage example, but coverage of natural user terms is thin and lacks common variations, matching anchor 2.

The distinctive 'fy ' prefix trigger carves a clear niche that is unlikely to fire for unrelated skills, matching anchor 3.