You can think of tr as a (very) simplified variant of sed: it will replace one character with another or remove some characters altogether.

您可以将tr看作为sed的(极其)简化的变体：它可以用一个字符来替换另一个字符，或者可以完全除去一些字符。

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All of the table cells are wrapped within a table row (TR), which in turn is wrapped in a DIV element.

所有单元格都包围在表行中(TR)，而表行又被DIV元素包围。

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Less than a year after they applied for a patent, the TR-55 came hurtling down the assembly line.

申请专利未满一年，TR - 55成批投入生产线。

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The UBS E-TRACS CMCI Food TR exchange-traded note ( FUD) was a close second in with gains of 48.85% in the last year.

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We explain why the Ferrari 250 TR is perhaps the greatest auto-racing artifact ever built, have dinner outdoors orchestrated by a company whose mission is to reconnect people with the land and local produce, and take a quick look at a Connecticut kayak maker who's very old-school.

FORBES: Editor's Note

Tiny, tinny TR-55s, TR-63s, and the 1962 TR-620 (pictured top left) were suddenly ubiquitous, and the shirt-pocket radio became a cultural icon.

FORBES: TRACKING THE EVOLUTION OF TAKE-OUT TUNES