迹象的英文：
mark
indication
sign
indicator

参考例句：

It's a promising sign.
这是个很好的迹象.

It is an evil sign to see a fox lick a lamb.
狐狸舔羔羊，这是凶迹象。

The signs bid fair for a profitable deal.
迹象表明可能是一笔有利可图的买卖。

"a cheerful person, to all appearances."
就表面迹象而论,是一个乐观的人

That's a straw in the wind that maybe he's fallen for her.
那是一种迹象，或许他已经爱上她了。

jaundice, seen best in the sclera, is an important sign
黄胆以巩膜处最明显，这是重要的迹象。

There seems to be every indication that there will be an earthquake.
所有迹象似乎都表明将要发生地震。

Initial investigation at the first sign of emergence of a new zoonotic disease must focus on practical characteristics
人畜共患病浮现的最初迹象一经觉察后所进行的初步调查研究，必须集中在一些实用特征，

Signs of overheating
过热迹象

There is a scent of trouble.
有出现麻烦的迹象。

mark是什么意思：
n. 符号；记号；分数，成绩；污点；迹象
v. 做记号；做标记；表明方位；标志；庆祝

Marking: Every package shall be marked with “SM” in diamond and marked the package number.
麦头每件包装应刷上菱形图案内有二字,并应刷上件号

impress a mark on [ upon ] a surface=impress a surface with a mark
在表面上打记号

To mark or mottle with spots.
有斑点，成斑驳用点作标记或使斑驳杂色

indication是什么意思：
n. 标示；象征；迹象

Image quality indicator(IQI)/image quality indication
像质指示器

switch point indicator
道岔尖轨表示器

bumping post indicator
车档表示器

sign是什么意思：
n. 迹象；预兆；记号，符号；手势；信号，暗号
v. 签名，签署；示意；打手势；用信号表示

This is a superscript sign.
这是个标在上方的符号。

This is a hopeful sign.
这是一个乐观的信号。

Scorpio is an Autumn Zodiac Sign（ as are the Signs of Libra and Sagittarius）。
天蝎：黄道十二宫的第八宫，每年10月23日前后太阳到这一宫。