The flask remains perfectly watertight whether it's upright or on its side.

这个真空水杯无论是直立还是平放都完全防水。

金山词霸

Maintain a straight posture with your feet positioned slightly wider than your shoulders.

保持直立姿势，双脚分开的宽度略大于肩膀。

金山词霸

Moira remained stiffly upright in her wooden chair.

莫伊拉僵硬地直立在她的木椅上。

金山词霸

Her legs failed to maintain her in an erect position.

她的腿无法使她保持直立姿势。

金山词霸

The cow suddenly reared up on its hind legs.

奶牛突然用后腿直立起来。

金山词霸

Maintain an upright posture when you sit and stay relaxed.

保持直立的坐姿，当你坐着并保持放松。

金山词霸

Her tangled strands stood up in unruly clumps.

她的发绺凌乱地成簇直立着。

金山词霸

Bent double with mirth, the gathered circle could no longer maintain their upright posture after an uproarious outburst of glee.

欢闹的笑声爆发后，聚集的人群笑得前仰后合，再也无法保持直立姿势。

金山词霸

The horse suddenly reared up and threw me off.

马忽然用后腿直立起来,把我摔下马背.

《简明英汉词典》

The stallion upreared on its hind legs.

种马用后腿直立起来.

《简明英汉词典》

Gradually raise your upper body to an upright position without using your hands for assistance.

避免用手协助，逐步将上半身抬起到直立姿势。

金山词霸

His spiky hairstyle and broad grin enhance his cheeky persona.

他那直立的发型和咧嘴的笑容突显了他厚脸皮的形象。

金山词霸

The tug nearly turtled twice, but I managed to keep it upright.

拖船两次都差点像海龟一样翻倒，但我设法让它保持直立。

金山词霸

With your body erect, stretch your arms outward to their maximum comfortable range without overexertion.

保持身体直立，将双臂向外伸展至最舒适的极限范围，避免过度用力。

金山词霸

Keep your head upright by maintaining an erect position in the neck and upper back.

保持头部直立，通过挺直脖子和上背部来实现。

金山词霸