The immediate cause of death is unknown.

造成死亡的直接原因不明。

《牛津词典》

Though the immediate cause of death in a startup tends to be running out of money, the underlying cause is usually lack of focus.

新生企业走向死亡，其表层原因是缺乏资金，其实深层原因是他们失去焦点。

youdao

For years I've been telling founders that the surest route to success is to be the cockroaches of the corporate world. The immediate cause of death in a startup is always running out of money.

许多年以来我总是告诫创始人们取得成功最可靠的方法就是做一只商界的蟑螂，导致小企业立即倒闭的原因就是总是缺钱。

youdao

"The immediate cause of death is attributed to drowning associated with neck trauma, and the manner of death will be listed as accidental, " said a Los Angeles coroners' spokesman.

BBC: Shatner's wife died while 'drunk'