In fact, many well designed languages are fully deterministic and require no lookahead at all.

事实上，许多精心设计的语言是完全确定性的，根本不需要前向环视。

youdao

There are modifiers to the regular expressions, both inside and outside the expression: case-insensitivity, lookahead, multiple matches, ignoring whitespace, number of matches, and so on.

正则表达式中有修饰符，它们既可以在表达式内部也可以在表达式外部： 区别大小写、向前查找（lookahead）、多重匹配、忽略空格、匹配的数目等。

youdao

The prefix tree adder is useful in compound adder implementation. It is preferred over the ripple carry adder and the carry lookahead adder.

该加法器适用于复合型加法运算，优于脉动进位加法器和超前进位加法器。

youdao

Studies have compared all the different types of observations (including surface weather stations, balloons and aeroplanes, etc) ingested in weather models and found that Metop data makes the largest contribution to the accuracy of 24-hour lookahead, at around 25%.

BBC: When 'state of the art' is also years old