在19世纪末20世纪初，撇号的使用变得更加统一。

During the late nineteenth and early twentieth centuries, the use of apostrophes became more consistent.

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1976年，管理局禁止了红色2号的使用因为怀疑它有致癌性，取代它的是红色40号。

In 1976, the agency banned Red no. 2 because it was suspected to be carcinogenic.It was then replaced by Red no. 40.

youdao

1976年，管理局禁止了红色2号的使用因为怀疑它有致癌性，取代它的是红色40号。

In 1976, the agency banned Red no. 2 because it was suspected to be carcinogenic. It was then replaced by Red no. 40.

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