λ∝1d2\lambda \propto \frac{1}{d^2}λ∝d21: If the molecule is twice as wide, it's actually four times more likely to collide (because the area it occupies matters).
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Chang Jian said the reduced fiscal support partly reflects improved prospects for trade and tariffs compared with a year earlier. In early 2025, China stepped up fiscal stimulus amid expectations that the United States might impose tariffs of around 60% on Chinese goods, whereas actual additional tariffs have so far been in the range of 10–20%.