Many have pinned their hopes on a sustained us recovery yet, to date, any acceleration in growth has been, to say the least, modest.

许多人寄望于美国经济持续复苏，然而迄今为止，美国经济增长并未显著提速。

youdao

High sustained + Gz acceleration produced by modern high performance aircrafts can induce brain damage because of ischemia and hypoxia.

现代高性能战斗机产生的高g值持续性正加速度可导致脑缺血、缺氧，继而引起脑功能障碍。

youdao

Recent studies indicate that when the lakes drain suddenly into the ice, the acceleration of flow is not sustained.

FORBES: Global Warming: Hotheads, Flatliners and Lukewarmers, Part One