名词性从句中连接从句和主句的词汇叫从属连词,定语从句中叫关系词,状语从句中叫从属连词,并列从句中连接两个并列成分的词汇叫做并列连词。 常见的连接词/关系词有that、whether、if;连...
"For the general population who have been vaccinated within a year, there is no need to obtain a booster shot for now," he said.对已完成免疫接种一年以内的普通人群，暂无必要...
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