Key constraints include poor physical infrastructure, inefficient product markets, lack of credit, and weak land and labor markets.

主要的约束包括农业基础设施差，产品市场低效，信贷不足，土地贫瘠，劳动力市场不景气等。

youdao

Unemployment is high, public schooling poor and the physical infrastructure in dire need of renewal.

此外，失业率居高不下，公立学校设施简陋，物质基础建设亟待更新。

youdao

The best kind of U.S. aid, like most of the work of the MCC, seeks to build economic growth in poor countries by strengthening health care, education, and governmental and physical infrastructure.

FORBES: Foreign Aid: The Good And Bad