变得复杂用英语怎么说？

变得复杂

例句

• The plot thickened. 情节变得复杂了。
• Complicating matters is the ending of the era of large oilfields. 大油田时代的终结正使问题变得复杂.
• But as the investigation continued, the plot began to thicken. 但是随着调查的继续深入，情况开始变得复杂起来。
• Valvular heart disease, usually aortic and mitral insufficiency, can complicate a variety of systemic diseases. 瓣膜性心脏病, 以主动脉瓣及二尖瓣闭锁不全为最常见, 可使各种全身性疾病变得复杂.
• But as the investigation continued, the plot began to thicken... 但是随着调查的继续深入，情况开始变得复杂起来。