When DB2 performs an index or table scan, DB2 will block on a row lock when it comes across an uncommitted row which another transaction has exclusively (X) locked.

DB2 在执行索引或表扫描时，如果遇到一个被另一个事务独占 (X) 锁定的未提交行，那么 DB2 将阻塞在行锁上。

youdao

With locking, if one thread attempts to acquire a lock that is already held by another thread, the thread will block until the lock becomes available.

使用锁定，如果一个线程试图获取其他线程已经具有的锁定，那么该线程将被阻塞，直到该锁定可用。

youdao

In fact, when this feature is enabled, and the INSERT operation requires a new or reused block, DB2 will take an exclusive (x) lock on the block in order to add it to the target cell.

实际上，当该特性被启用，并且INSERT操作要求一个新的或重用的块时，DB 2将在块上采用一个独占的(X)锁，以便将它添加到目标单元。

youdao

Google, which successfully petitioned the FCC to decree to open the "C block" of spectrum to outside devices and applications, said it had an early lock on the C block, but was eventually outbid by Verizon and took home no licenses.

FORBES: Magazine Article

Google (nasdaq: GOOG - news - people ), which successfully petitioned the FCC to decree to open the "C block" of spectrum to outside devices and applications, said it had an early lock on the C block, but was eventually outbid by Verizon and took home no licenses.

FORBES: Carriers Outline Wireless Future

Parents may pre-emptively block purchases from Web sites, and instantly lock the card after seeing anything objectionable.

FORBES: This Week In Credit Card News: Steady Credit Card Use, New Justin Bieber Card Videos