Silently update the product with the latest updates, and install new optional features.

用最新的更新以静默方式更新产品，并安装新的可选特性。

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The installation image, updates and optional features are located on the network server.

安装镜像、更新和可选特性位于网络服务器上。

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The JSR-107 spec has a mandatory feature set and two optional features: annotations and JTA.

JSR - 107规范有一个强制的功能集和两个可选功能：注解和JTA。

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But with optional features like racing-inspired paddle shifters, blind-spot detection, adaptive cruise control and massaging seats, the price escalates quickly.

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Optional features are automatic load-leveling and electronic parking assistance.

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The precious little 4.3-inch Windows CE 5.0 (the photo shows XP but whatever) clamshell's got a 533MHz Samsung 2442A CPU, 128MB of SDRAM, between 1GB and 4GB of flash memory, and a USB 2.0 port on top of a host of optional features (GPS, DVB-T digital TV, WiFi, the ability to tell you the future).

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