40の大台に乗る: reach [hit, turn] the big four-O 40歳の大台に達する: hit the big four-oh 2000年の大台: the big two-zero-zero-zero 50の大台: big five-O 60の大台: big six-O 70の大台: big seven-O 80の大台: big eight-O 90の大台: big nine-O 50の大台に乗る: reach [hit, turn] the big five-O 60の大台に乗る: reach [hit, turn] the big six-O 70の大台に乗る: reach [hit, turn] the big seven-O 80の大台に乗る: reach [hit, turn] the big eight-O 90の大台に乗る: reach [hit, turn] the big nine-O 大台: 大台 おおだい (stock) 100-yen unit high level (of stock prices) 1000億ドルの大台を超える: cross the $100 billion mark