The neighbors' phone call brought my dad and me rushing to their barn to help with a difficult delivery.

邻居打电话说有只羊难产，我跟爸爸便匆忙赶往他们家谷仓。

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Without general guidelines, controls, and checks and balances in the process, managing a project in a global development and delivery (GDD) environment is difficult.

缺少了一般指南、控制，和过程中的检查及平衡，在全球的开发和交付(global development and delivery)环境中管理一个项目是很困难的。

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To make things more difficult, utility companies must deliver advanced metering and smart grid technology on a mandated, aggressive delivery schedule — and it absolutely must be reliable.

更困难的是，电力公司必须在一个规定的、具有挑战性的交付模式中提交先进的测量技术和智能电网技术 — 很显然这必须是可靠的。

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Another difficult problem is that the Indian market demands a cash on delivery (COD) option, in which the consumer pays the courier once they have received the product.

FORBES: The Growing Pains of Indian E-Commerce: What You Need to Know

"It's not just the delivery of improved revenue and profits in a market as difficult as this one, " says Matthew Greenburgh, the co-head of Merrill Lynch's Global Financial Institutions Group and RBS' investment banker.

FORBES: Magazine Article

For example, the bill makes it difficult for the Postal Service to implement its plan to cut delivery to five days a week to reduce costs.

WSJ: Postal Service Registers $5.2 Billion Loss