The editor will mark the validation errors with red marks on the left and right sides, and add a red wavy underline to the invalid syntax.

编辑器会左右两侧用红色标记标明验证错误，并给无效的语法加一条红色波浪型的下划线。

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The discovery, if confirmed, will mark a turning point in our exploration of the Red Planet, with future missions to Mars being directed to the locations of seepage.

这一发现如果被证实，将标志着我们探测这一红色行星的一个转折点，将来登陆火星的任务将是寻找这些渗出物的位置。

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The red X error icon is decorated with a question mark to show that help is available for a particular error.

带问号的红色 X 错误图标表示这个错误有相关的帮助。

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but I mark the whole paper up with a lot of red ink if there are mistakes,

但我在批论文的时候，也会把语法错误的地方用红笔标出来，

与哲学系教授 - SpeakingMax英语口语达人

Network Magic can detect a network outage and mark it with a big red "X" on the topology diagram showing you where the outage occurred, and gives you some indication of how to fix it.

ENGADGET: The Family is the Network: Pure Networks' Network Magic wants to make things simple

The shavings were then immunostained bathed in a special reagent that would mark the presence of abnormal proteins with a bright, telltale red or brown stain on the surface of the tissue.

NEWYORKER: Offensive Play

The teacher tried to get it off with a wash cloth, and it left a red mark on the side of his face.

CNN: What teachers really want to tell parents