A line is an effective element of design because it can lead the viewer's eye.

线条是设计中有力的要素因为它能引导观众的眼睛。

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It is a very important element though, and can lead the viewer through a wide range of emotions.

这是一个非常重要的因素虽然，并可能导致观众通过各种各样的感情。

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Lead is not a necessary element to crop growth but a pollutant with accumulation problems.

重金属铅不是作物生长的必需元素，而是一种对作物有积累性危害的污染物质。

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Yes that's right, the base metal element lead, Pb, or more exactly the lead-based chemical compound Pb(CH2CH3)4 added to petrol to make car engines run more smoothly.

BBC: Does lead poisoning make you violent?

Saints went on to take the lead but there was an element of luck as Long's kick hit the upright and fell into the arms of prop Hargreaves to give him an easy try but again Long missed the extras.

BBC: Leeds 12-26 St Helens

My ELT model separates out the leadership element distinctly offering different ways to lead such groupings, while the collaborative work profiles have it tied to the grouping notion.

FORBES: A Road Trip Through Different Views On Collaborative Work