青黄不接

青黄不接 [qīng huáng bù jiē]

1. ■ Green and yellow have not joined--a new crop has not yet come.; (The granary is nearly empty) but the new crop is not yet ripe.; food shortage between two harvests.; temporary shortage; The new crop is [has] not yet come in.; (It was the period of the spring shortage), when last season's crops were almost eaten up and the new ones were not yet ripe.; short of food before the new harvest; When the crop is still in the blade, the old stock is already consumed.; when the new crop is still in the blade and the old one is all consumed:

现在科技人材青黄不接。 There are not enough trained younger men and women ready to take over from older experts.