thirteen

n.

十三；十三岁；十三个；

num.

十三；

adj.

十三的，十三个的；

复数：thirteens

1. The number thirteen is often considered unlucky.
   十三这个数字常常认为是个不吉利的数字。
2. When she was thirteen, her family moved to England.
   十三岁时，她们家搬到了英国。

The thirteen books of Euclid's Elements /
Feeding ecology of thirteen syntopic species of anurans in a seasonal tropical environment
The distribution of thirteen GABAA receptor subunit mRNAs in the rat brain. III. Embryonic and postnatal development
Burrow distribution of the thirteen-lined ground squirrel in grazed mixed-grass prairie: Effect of artificial habitat structure
INFLUENZA OCCURRING IN PREGNANT WOMEN: A STATISTICAL STUDY OF THIRTEEN HUNDRED AND FIFTY CASES
Persistent Inequality: Changing Educational Attainment in Thirteen Countries. Social Inequality Series.
Persistent Inequality: Changing Educational Attainment in Thirteen Countries. Social Inequality Series.
Optimistic self-beliefs: Assessment of general perceived self-efficacy in thirteen cultures
The diagnostic accuracy of the rectal biopsy in acute graft-versus-host disease: a prospective study of thirteen patients.
The Home Environments of Children in the United States Part II: Relations with Behavioral Development through Age Thirteen