The superior nuchal line is not always a reliable external anatomical mark.

上项线不是一个可靠的浅表解剖学标志。

youdao

Create a new user id in your external security facility and mark this user id as invalid so that it cannot be used.

在外部安全设施中创建一个新的用户ID，并使这个用户ID无效，使之不能被使用。

youdao

Key: key (make sure that you mark the key as the external identifier).

key： key(确定您已经将键值标记为外部性标识符)。

youdao

The only possible line of compromise would be if the government accepted something like the Scottish model, where teachers use a bank of external tests, which they set when they think pupils are ready and which they mark themselves.

BBC: School tests boycott: Deja vu?