二十九;
例句:
Twenty-nine eyes of primary open angle glaucoma ( POAG ) were tested with patternreversal VEP ( PR-VEP ).
29只原发性开角型青光眼行图象反转视觉诱发电位 ( PR-VEP ) 检查.
Twenty-nine minus thirteen equals sixteen.
二十九 减十三等于十六.
It has twenty-eight or twenty-nine days.
二月有28天或者29天.