He has this ability of being able to remain as motionless as a statue, for hours on end.

他有能像雕塑一样连续数小时保持静止的能力。

《柯林斯英汉双解大词典》

On the threshhold stood a motionless white form, lighted up by the moon.

门槛上一动不动地站着一个白色身影，月光把它照亮了。

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To make calculations manageable even by computers, most of the models suppose either that the oceans are a motionless swamp or that they don't exist at all.

为了使计算机也能进行计算，大多数模型要么假设海洋是一个静止的沼泽，要么假设它们根本不存在。

youdao

Sometimes a heron can be seen standing on one thin leg,motionless.

VOA: special.2009.10.06

On a busy Friday before the Labor Day holiday, 25 customers were ensnared in a motionless line in a Wells Fargo branch in Santa Monica, California.

FORBES: Hurry Up And Wait

For a moment, Haslet-Davis lay motionless amid a cloud of dust and mounting panic.

CNN: Boston bombings destroy dancer's foot, but not her spirit

Wearing a red prison jumpsuit with "Centre County" printed on the back, Mr. Sandusky stood motionless in a crowded but hushed courtroom as Judge John Cleland read a list of individual sentences for 45 counts related to child sex abuse.

WSJ: Jerry Sandusky Sentenced to 30 to 60 Years