One problem is that complex disorders - like migraines - can be caused by multiple genes as well as by other biochemical and environmental factors.

其中的一个难题是，复杂的疾病——比如偏头痛——可能由众多基因引起，也可能由其它生物化学和环境因素引起。

youdao

Emotion is the complex psychophysiological experience of an individual's state of mind as interacting with biochemical (internal) and environmental (external) influences.

情感是个人心境复杂的精神心理体验，它与生物(内部)和环境(外部)力量互相作用。

youdao

The resort complex would straddle a large portion of a key environmental area.

这个度假胜地综合设施要横跨关键的环境区域的大部分。

youdao

As I discussed in my overview of hydroelectric power in 2008, the main barriers to new hydroelectric facilities are complex environmental studies, permitting issues, and water laws.

FORBES: Administration Lays the Groundwork for Hydropower Boom

Similarly, trying to contain the oil and limit the environmental impact is also complex, involving multiple technologies, the coordination of public agencies and private sector firms, and the mobilization of huge amounts of equipment and people.

FORBES: Let's Not Compound Complexity

Some worry about the infrastructural and environmental impact of the massive complex the Saudis seek to build on the new ISA campus.

CENTERFORSECURITYPOLICY: Welcome to Faisal County