You'll need to lock the focus if you have an auto-focus camera because most of them focus on whatever is in the center of the viewfinder. Try it yourself.

如果您使用的是自动对焦相机，您需要先锁定焦点，这是因为大多数相机将焦点对准取景器中心的物体。

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Based on PKM gasifier coal lock hopper auto feed coal DCS system program's development and application, PKM gasifier can auto feed coal and produce gas safely and steady.

通过对加压气化炉煤锁d CS自动加煤系统的开发与应用，来实现PK M气化炉加煤的自动和优化控制，以确保气化炉稳定运行。

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Auto-tracking System has two kinds of target lock-on mode such as auto lock and manual lock.

自动跟踪系统有自动锁定工况和人工锁定工况两种目标锁定方式。

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They assumed they had a lock on local advertising to individuals with their papers' classified ad departments, and on major advertisers like auto manufacturers, auto dealers and movie distributors and theaters with their display ads.

FORBES: The accepted wisdom that the customer is king is all wrong.