bloc

a chip of the old block

举止酷似父亲的孩子

a chip off the old block

相貌[脾气]和父母一样的孩子（多指男孩）

a stumbling block

n. 绊脚石

a-block

滑车拉到头

absolute block

[计] 绝对块

absolute block signal

[电] 绝对闭塞记号[机]

absolute block system

[电] 绝对闭塞制, 绝对分段制

absolute permissive block

[电] 权宜绝对塞

absolute permissive block system

[电] 权宜绝对塞制

activation block

[计] 激励分程序

actual block address

[计] 实际分程序地址

actual block processor

[计] 实际块处理程序

adapter control block

[计] 衔接器控制块

adjustable brake block

[机] 调整闸块

adjustable thrust block

[机] 可调整止推轴承

adjusting block

[机] 调整块

adrenergic blocking agent

[建] 类上腺素阻断剂

aerial blockade

[法] 空中对销

air block

[医] 空气阻滞

algorithm block

[计] 算法字组