在美国需求疲软的情况下希腊的后备计划是什么还不明确。
It is not yet clear what Greece's fallback plan will be if American demand is weak.
目前，该方案对社会健康保护的影响及其与普遍覆盖计划的联系尚不明确，因为方案还在演化。
At present, the impact of the scheme on social health protection and its links with universal coverage plans are unclear as it is still evolving.
有时候，西摩先生不知道怎么打发他的空闲时间，他的休假计划很不明确。
Sometimes Mr. Seymour didn't know what to do with his vacant time. His vacation plan was rather vague.
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